The papers of American New York School painter Ludwig Sander measure 2.8 linear feet and date from 1910 to 1975. Found are biographical materials primarily consisting of army records; correspondence with family and colleagues discussing exhibitions and other art-related activities; diaries; personal scattered business records; address books and art history typescripts; sketchbooks and illustrations for magazines; photographs of Sander, his colleagues, his travels, and exhibition openings; and miscellaneous printed material. The collection documents Sander's career and interactions with some of the most important modern artists of twentieth century.

The records of the Poindexter Gallery measure 7.1 linear feet and date from 1931-1985 with the bulk of the materials dating from 1955-1978 when the gallery was active. The majority of the collection consists of artists' files documenting the gallery's relationships with its artists, including exhibitions, and containing a wide variety of materials, including photographs. Also found are the "desk files" kept by the gallery's founder, Elinor Poindexter; correspondence; and financial and legal records.

The papers of photographer, filmmaker, and painter Rudy Burckhardt measure 5.6 linear feet and date from 1934 to 2015. A bulk of the collection consists of black and white negatives which document over 260 mid-to-late twentieth century modern artists, their work, studios, and/or exhibitions. Notable artists include Willem de Kooning, Dan Flavin, Joseph Cornell, Helen Frankenthaler, Donald Judd, Franz Kline, Roy Lichtenstein, Louise Nevelson, Isamu Noguchi, Frank Stella, and many others. Burckhardt was hired to photograph for a number of New York art galleries such as the Leo Castelli Gallery and Green Gallery; art collectors including Chaim Gross and David Rockefeller; and art magazines such as ARTnews. Personal papers include announcements and an exhibition catalog; clippings; photographs on postcards; and a book, entitled Conversations with Rudy Burckhardt About Everything, by Simon Pettet, 1987. A small but rich addition to the collection dates from 1941-2015 and contains a curriculum vitae; letters from Joe Brainard, Harold Schimmel, and others; writings; one scrapbook dating from World War II containing letters Burckhardt wrote to Edwin Denby; printed announcements and clippings; and one photograph of Burckhardt taken by Yvonne Jacquette.

The papers of New York gallery owner and art dealer David Herbert measure 5.8 linear feet and date from circa 1909-1996, with the bulk of the material dating from 1945-1995. Herbert's papers document his years working for Betty Parsons Gallery, Sidney Janis Gallery, Graham Gallery, and others; the operation of the David Herbert Gallery from 1959-1962; Herbert's partnerships and agreements with Richard Feigen and others; and his activities as an independent dealer. Records include biographical material, correspondence, notebooks, subject files, artist files, exhibition files, business records, printed material, and photographs.

The Dwan Gallery records measure 2.3 linear feet and consist primarily of files of exhibitions curated by Virginia Dwan at Dwan Galleries in Los Angeles (1959-1967) and New York (1965-1971). Found within this nearly comprehensive set of exhibition files may be lists of exhibited works, price lists, photographs, slides or color transparencies of installations, invitations, full-size posters, magazine and newspaper clippings and exhibition catalogs.

The papers of New York editor and art critic Thomas Hess measure 10.0 linear feet and date from 1939 to 1978. The collection includes biographical materials, correspondence, extensive writings and notes, artists and subject files that also include recorded conversations with artists and others, printed materials, photographic materials, and artwork.

The papers of Fred Mitchell, 1938-2007, measure 14.3 linear feet. Correspondence, writings, 29 diaries, and subject files, document his personal life and career as a painter and educator in New York City. The papers also include biographical materials, artwork, sketchbooks, printed material, and photographs.

The Robert Richenburg papers, circa 1910s-2008, measure 5.3 linear feet. Biographical material, correspondence, subject files, writings, sound and video recordings, printed material, and photographs document the professional career and personal life of the educator and New York School painter and sculptor best known for his Abstract Expressionist paintings.

The papers of sculptor, painter, and publishing executive Alexander Semeonovitch Liberman date from circa 1913-2003 and measure 59 linear feet. Found within the papers are biographical materials; correspondence with family, galleries, museums, and many artists; numerous recorded interviews and transcripts with and by Liberman, including one of Walter Hopps; writings and writing project files; extensive subject files maintained by Liberman; exhibition files; printed materials; scattered drawings; and extensive photographs of Liberman's artwork, exhibitions, Liberman, and of Liberman with notable artists, dealers, collectors, and critics. Many of the photographs were taken by noted photograhers. Also found within the papers are unidentified sound and video recordings. Additional sound and video recordings have been integrated into other series.

The papers of art historian, dealer, critic, and curator Katharine Kuh measure 12 linear feet and date from 1875-1994, with the bulk of the material dating from 1930-1994. The collection documents Kuh's career as a pioneer modernist art historian and as the first woman curator of European Art and Sculpture at the Art Institute of Chicago. Found within the papers are biographical material; correspondence with family, friends and colleagues; personal business records; artwork by various artists; a travel journal; writings by Kuh and others; scrapbooks; printed material; photographs of Kuh and others; and audio recordings of Kuh's lectures and of Daniel Catton Rich reading poetry.