The Technical Reference Files comprise an artificial collection that currently contains 1,900 cubic feet of aviation and space related materials, organized in 22 subject series. File materials include photographs, press releases, clippings, correspondence, reports, and brochures, on individuals, organizations, events, and objects.

The records of the Richard York Gallery, a New York gallery specializing in American art from early 1800s to 1950, measure 79.3 linear feet and date from circa 1865-2005, with the bulk of the material dating from 1981 to 2004. Three-fourths of the records are artists' artwork files, documenting the sale and consignment of nearly 6,500 works of art. The gallery's activities are also recorded through correspondence, client files, gallery invoices, inventories, business and financial records, printed materials, scrapbooks, photographic materials of artwork, and estate records for the John Marin estate and Sergio Stella estate (Joseph Stella). An addition of 10.2 linear feet, dated circa 1865 to 2005, includes artists' files arranged alphabetically containing printed material, clippings, exhibition announcements, and scattered correspondence and financial documents.

The Colin de Land collection measures 15.15 linear feet and 0.901 GB and dates from 1968 to 2008, with the bulk of the collection dating from the early 1980s through 2003. The majority of the collection consists of photographic material, primarily snapshots, documenting daily life in and around de Land's gallery American Fine Arts, Co., as well as de Land's pesonal life and affairs. There are candid photographs of exhibition openings, day-to-day gallery operations, art fairs, vacations, social gatherings, and New York City street scenes. Also included are some personal objects belonging to de Land and his wife Pat Hearn, as well as two scrapbooks containing items once decorating the walls of de Land's office at American Fine Arts. The collection includes video recordings documenting trips to Cape Cod, Hearn's illness, and occasional art world events.

The Smithsonian Institution Festival of American Folklife, held annually since 1967 on the National Mall in Washington, D.C., was renamed the Smithsonian Folklife Festival in 1998. The materials collected here document the planning, production, and execution of the annual Festival, produced by the Smithsonian Center for Folklife and Cultural Heritage (1999-present) and its predecessor offices (1967-1999). An overview of the entire Festival records group is available here: Smithsonian Folklife Festival records.

The André Emmerich Gallery records and André Emmerich papers measure 311.4 linear feet and date from 1929 to 2009. The collection documents the business of the André Emmerich Gallery as well as André Emmerich's life and activities related to the business of selling art. Gallery records include correspondence; appointment books; administrative and subject files; exhibition files; artist files and accounts; inventory, sales, purchase, and consignment records; chronological files; financial and legal records; printed materials; original artwork; photographic and audiovisual materials. Also found are personal papers and records relating to André Emmerich. TheA small addition received in 2014 includes general correspondence, administrative files, exhibition files, artists' files, inventory records, consignment records, printed material, photographic materials, and André Emmerich personal papers and records.

The Technical Reference Files comprise an artificial collection that currently contains 1,900 cubic feet of aviation and space related materials, organized in 22 subject series. File materials include photographs, press releases, clippings, correspondence, reports, and brochures, on individuals, organizations, events, and objects.

The Leo Castelli Gallery records measure 215.9 linear feet and date from circa 1880-2000, with the bulk of the materials dating from the gallery's founding in 1957 through Leo Castelli's death in 1999. The major influence of dealer Leo Castelli and his gallery on the development of mid-to-late twentieth century modern art in America is well-documented through business and scattered personal correspondence, administrative files, exhibition files, extensive artists' files and printed materials, posters, awards and recognitions, photographs, and sound and video recordings. Also included are records for the subsidiary firms of Castelli Graphics and Castelli/Sonnabend Tapes and Films.