The papers of New York art collector Chester Dale measure 8.4 linear feet and date from circa 1883-2003. Dale amassed one of the world's most complete collections of nineteenth and twentieth century French art, was a collector of eighteenth century American portraitists, and a patron and collector of twentieth American artists including George Bellows and Mary Cassatt. The bulk of the collection dates from 1920 to 1970 and documents Dale's activities through biographical material, correspondence, memoirs and other writings, purchase, sales and estate records, printed material, scrapbooks, and photographs.

The collection consists of 378 posters documenting important public service issues including education, health and safety, and cultural programs. These posters were widely displayed throughout the island and reflect key trends in the social history of Puerto Rico for nearly fifty years.

Photograph prints, negatives and color transparencies documenting early modern American artists and the contemporary artist Richard Lindner.

The Victor D. Spark papers measure 22.2 linear feet and date from circa 1830 to 1983, with the bulk of the material from 1930 to 1970. The papers document Spark's career as a New York City art dealer and appraiser who was most active from World War II through the 1970s, focusing on Old Masters paintings and 19th and early 20th century American art. Found within the papers are biographical materials, artist files, client files, financial records, legal records, printed material, and photographs.

The East Village Area X Gallery records measure 2.4 linear feet and date from 1977-1988. The collection consists primarily of artists files for fifteen artists represented by or of interest to the gallery. The files are varied but may include biographical information, correspondence, financial and inventory records, printed materials, and photographs. Gallery records include scattered financial records, publicity files, and printed materials.

The papers of American art collector Keith Warner measure 0.7 linear feet and date from 1935 to 1975. Correspondence, collecting files, and artwork detail Warner's role as a collector of art in the mid-twentieth century. Present in the collection are materials related to Alexander Calder, Roland Dorcely, Stanton MacDonald-Wright, Piet Mondrian, Alfred Stieglitz, and Max Weber.

The records of Owen Gallery measure 9.4 linear feet and 0.093 GB and date from 1929-2010, bulk 1980-2010. The gallery, which operated from 1986 to 2009 in New York, specialized in late nineteenth and early twentieth century American art with an emphasis on The Eight, Ashcan, and early American modernism. Michael Owen and James Yost owned and directed the gallery. Found within the records are exhibition files; inventory and sales records; printed and digital material; and records regarding painter Yasuo Kuniyoshi. Material dating from before 1986 when the gallery was established is research related to an artwork's provenance.

The papers of curator Riva Castleman measure 10.6 linear feet and 7.83 GB, and date from 1930-2013 with one printed item dating from 1871. The collection contains biographical material, correspondence including mail art, writing project files, notebooks, interviews, project files, printed material, photographic material, and artwork. The collection richly documents Castleman's writing and research process and contains dozens of manuscripts for books, catalogs, and essays, as well as related correspondence and research including audio interviews and sound recordings. Several of Castleman's books about contemporary printmaking, such as Prints of the 20th Century (1976) and American Impressions (1985), are extensively documented, as are many of the catalogs she produced to accompany Museum of Modern Art exhibitions, including Jasper Johns: A Print Retrospective (1987) and The Prints of Andy Warhol (1990). Some records are in born-digital form including correspondence, manuscript drafts, and audio conversations with Tatyana Grosman. Other interviews are on sound cassettes.

The records of Ex Libris measure 2.0 linear feet and date from 1973-2007. Ex Libris was a New York City based antiquarian establishment that dealt in rare 20th century avant-garde books and periodicals, and was founded by Elaine Lustig Cohen and her husband Arthur A. Cohen. The records include professional files, sales records, printed material, and photographic material.

The papers of contemporary art collectors Dorothy and Herbert Vogel measure 47.5 linear feet and date from the 1960s to 2009. Found is scattered general correspondence, artists' files, subject files, business records, and printed material relating to the Vogel Collection. Artists' and subject files create the bulk of the collection, the majority of which is printed material but includes some correspondence from artists.