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(With Lloyd Goodrich) Albert Pinkham Ryder: Painter of Dreams. New York: Harry N. Abrams, Inc., 1989, 256 pp.
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The Language of Contemporary Criticism Clarified. Madison, CT. Sound View Press, l999, 175 pp.
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Alfred Stieglitz, Photography, and the Two Cultures. Newark (DE): University of Delaware, College of Arts and Science, 1982, 17 pp.
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(Editor and contributor) Avant-Garde Painting and Sculpture in America, 1910-25. Wilmington (DE): Delaware Art Museum, April 4-May 18, 1975.
(Editor and contributor) Symbolism of Light: The Photographs of Clarence H. White. Wilmington: Delaware Art Museum, April 15-May 22; New York (NY): International Center of Photography, July 7-September 11, 1977.
A Pictorial Heritage: The Photographs of Gertrude Käsebier. Wilmington: Delaware Art Museum, March 2-April 22; Brooklyn (NY): The Brooklyn Museum, May 12-July 8, 1979.
(Editor and contributor) Eakins in Avondale and Thomas Eakins: A Personal Collection. Chadds Ford (PA): Brandywine River Museum, March 15-May 8, 1980.
(Editor and contributor) Pictorial Photography in Philadelphia: The Pennsylvania Academy's Salons, 1898-1901. Philadelphia (PA): The Pennsylvania Academy of the Fine Arts, March 9-April 18, 1984.
(Editor and contributor) Selections from the Lloyd Goodrich--Albert Pinkham Ryder Archive. Newark (DE): University of Delaware Library, April 17-August 15, 1989.
(Editor and contributor) Brandywine Valley to the Bay: Art from Private Collections. Newark (DE): University Gallery, October 3-November 3, 1991.
(Editor and contributor) African-American Art: The Paul R. Jones Collection. Newark (DE): University Gallery, February 11 - April 4, 1993.
(Editor and contributor) The Gist of Drawing: Works on Paper by John Sloan. Wilmington (DE): Delaware Art Museum, October 3-November 30, 1997.
Clara Sipprell, Pictorialist. New York (NY): Marcuse Pfeifer Gallery, April 19-May 24, 1980.
Frank S. Herrmann (1866-1942), Paintings in Gouache. New York (NY): The Marbella Gallery, November 3-20, 1982.
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(With David M. Robb, Jr.) "Paintings by George Fuller in American Museums and Public Collections," The Art Quarterly, vol. XXIV, no.3 (Autumn, 1961), pp. 286-294.
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"Picabia's Jeune fille américaine dans l'état de nudité and Her Friends," The Art Bulletin, vol. LVII, no. l (March, 1975), pp. 110-115.
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(With Cathleen A. Branciaroli) "The Artistry of Clarence H. White" in Symbolism of Light: The Photographs of Clarence H. White (exhibition catalogue). Wilmington: Delaware Art Museum, April 15-May 22; New York: International Center of Photography, July 7-September 11, 1977, pp. 34-37.
"On the Connoisseurship of Photographs," The Print Collector's Newsletter, vol. VIII, no. 5 (November-December 1977), pp. 137-138.
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"Aspects of Seurat's Chromo-luminarist Technique and Method: Les Poseuses and La Parade and Notes on Seurat's Palette." In Seurat in Perspective, ed. by Norma Broude. Englewood Cliffs, N.J.: Prentice-Hall, Inc., 1978.
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"Progressives vs. the Academy at the Turn of the Century," in American Modernism, 1910-1945. Santa Barbara: Santa Barbara Museum of Art, April 4-26, 1981, n.p. (7 pp.)
"Gertrude Käsebier," in Prints and Photographs, ed. by Mary Jean Madigan and Susan Colgan. New York: Art & Antiques, 1983, pp. 138-145.
Baltimore, "Sources of Seurat's Theory of Art," January 23, 1963.
Chairman, Session on American Art, New York, January 27, 1966.
St. Louis, "The Art and Science of the First Motion Pictures," January 26, 1968.
Chairman, Session on Art and Technology, Boston, January 30, 1969.
Chicago, "Hardesty Maratta, Pseudo-Science, and the Art of Painting," January 28, 1971.
Detroit, "Eduard Steichen: The Painter as Photographer, the Photographer as Painter, 1897-1908," January 25, 1974.
Detroit, "Picabia's Portrait d'une Jeune Fille Americaine dans l'Etat de Nudité" and Her Friends," January 26, 1974.
New York, "Picasso, Stieglitz, and the 291 Circle: New Light on the Paris-New York Axis," January 27, 1978.
New Orleans, "Thomas Eakins and Women: A Psychosexual Profile," February 26, 1981.
New York, "The Ascendancy of Women Photographers in the Pictorial Movement, 1895-1910," February 25, 1982. (Women's Caucus for Art)
Philadelphia, "Attributing and Reattributing Thomas Eakins' Photographs," February 17, 1983.
New York, "Marsden Hartley, Albert Pinkham Ryder, and the Mystical Tradition," February 13, 1986.
Houston, "Will the Real Mr. Ryder Please Stand Up?" February 11, 1988.
New York, "Popular Culture and the Postmodern Sensibility: Camp, Punk, and the Nostalgic Revivals," February 16, 1990.
Seattle, "The Catalogue Raisonne' in an Age of Critical Theory", February 4, 1993 (discussant). "American Drawings," February 6, 1993 (discussant).
Los Angeles, “Clouds Over the Moon: Ryder’s Fading Reputation,” February 12, 1999
National Gallery of Art, "The Significance of Seurat's Art," January 3, 1965.
Metropolitan Museum of Art, New York, "Robert Henri and the Ash Can School," October 10, 1965.
Johns Hopkins University, "The Armory Show of 1913," November 18, 1968.
Metropolitan Museum of Art, New York, "Thomas Eakins: His Life, His Art, and His World," May 4, 1969.
Philadelphia Museum of Art, "Alfred Stieglitz and Vanguard Painting in America," March 2, 1970.
Art Gallery of Ontario, "Vuillard, The Nabis, and the Symbolist Theory of Painting," October 7, 1971.
National Gallery of Art, "Alfred Stieglitz and the Birth of Modern Art in America," November 12, 1972.
International Museum of Photography, George Eastman House, Rochester, "Stieglitz's Credo of Modernism: Its Manifestation in Paul Strand's Early Photographs," February 20, 1975.
Society for Photographic Education Conference, University of Delaware, "The Death of Painting and The Mystique of Contemporary Photography," April 15, 1978.
Tufts University, Symposium on the Stieglitz Circle, "Käsebier, Pictorialism, and the Symbolist Aesthetic," February 24, 1979.
University of Delaware, Symposium on American Art, "Thomas Eakins: Science, the Academy, and the Rationalization of Sight," April 20, 1979.
Haverford College, Symposium on Lewis Hine, "The American Artist and the Urban Scene: the Rise of the Ash-Can School," November 17, 1979.
National Gallery of Art, Center for Advanced Studies in the Visual Arts, "The Stieglitz Photographs at the National Gallery of Art: An Undiscovered Resource," January 8, 1981.
Terra Museum of American Art and Northwestern University, Symposium on Three American Masters of Watercolor, "Pendergrast, Marin, and Burchfield," May 30, 1981.
Museum of Fine Arts, Boston, "Thomas Eakins and the Scientific Tradition." October 7, 1982.
Pennsylvania Academy of the Fine Arts, Philadelphia, "Alfred Stieglitz and the Photo-Secession," Juned 23, 1983.
University of Southern California, Los Angeles (Getty Lectures in the Fine Arts). Four lectures on "The Changing Concept of the Avant-Garde," March-April, 1985.
Memorial Art Gallery, University of Rochester, "The Maturing of the Avant-Garde: Native Tendencies and European Influences in the 1920's," October 23, 1985.
The J. Paul Getty Musemum, "Karl Struss and Pictorial Photography in California," December 11, 1986.
Walker Art Center, Minneapolis, "The Stieglitz Circle and the Skyscraper," October 20, 1987.
Rutgers University (Camden), Symposium on Whitman and the Visual Arts, "Thomas Eakins and Walt Whitman in Camden," April 28, 1989.
Los Angeles County Museum of Art, "Partners in Art: Alfred Stieglitz and Georgia O'Keeffe," May 7, 1989.
National Museum of American Art and Conservation Analytical Laboratory, Smithsonian Institution, "A Deconstructive View of Albert Pinkham Ryder," June 11, 1990.
The Brooklyn Museum, "Ryder, True and False: Adventures in Art Forgery," October 13, 1990.
National Portrait gallery and the Courtauld Institute of Art, London, "Feminist or Chauvinist? Thomas Eakins and His Women." October 9, 1993.
Heckscher Museum, "Proto-Modernism in the Art of Thomas Anshutz," October 22, 1994.
University of Paris (Sorbonne), "Postmodernism and American Popular Culture," March 28, 1996.
New York University, Symposium on Expanding Horizons: American Painting, 1865-1930, "Homer, Eakins, and Ryder: Public Taste and The Shaping of an American Canon," April 25, 1996.
Corcoran Gallery of Art, "Homer on Eakins," June 19, 1996.
Delaware Art Museum, "John Sloan, Draughtsman," October 22, 1997.
Metropolitan Museum of Art, “Paul Strand, Alfred Stieglitz, and the Birth of Modernist Photography,” March 30, 1998
New York University, Symposium on Radical Departures: Aspects of the Modern in American Painting, 1876-1939, “What Does Modernism Mean? American Painting, 1835-1915,” May 7, 1998