Subject heading revision by the Library of Congress, 1941-1950.
Publisher: Columbia University School of Library Service
Published: 1951
Place of publication: [New York]
Language: eng
Format: Microform
Number of pages: 97
Subjects: Library of Congress -- Catalogs.; Subject headings.
Notes: Also available on microcard, ACRL series, no. 15.

Microfilm. New York : Columbia University Libraries, [19--] 1 microfilm reel.  35 mm.