The National union catalog of manuscript collections.

APA Citation

Library of Congress. Descriptive Cataloging Division., Library of Congress. Manuscripts Section., Library of Congress. (19611993). The National union catalog of manuscript collections. Washington, D.C.: Library of Congress.

MLA Citation

Library of Congress. Descriptive Cataloging Division, Library of Congress. Manuscripts Section, and Library of Congress. The National Union Catalog of Manuscript Collections. Washington, D.C.: Library of Congress, 19611993.