National register of microform masters.
Library of Congress.Catalog Management and Publication Division.
Library of Congress.Catalog Publication Division.
Washington : Library of Congress,
1965-1983.
Issues for 19  -   compiled by the Library of Congress with the cooperation of the American Library Association and the Association of Research Libraries.
Issues for    -1982 compiled and edited by the Catalog Publication Division, Library of Congress; 1983-   by the Catalog Management and Publication Division, Library of Congress.
Books on microfilm
Library of Congress catalogs