Subject headings in microform /
Library of Congress.Subject Cataloging Division.
Washington : Library of Congress,
Introduction available only in printed form.
Description based on: Mar. 1980.
Each issue is cumulative.
Represents the latest ed. of: Library of Congress subject headings, plus those headings established subsequently through the current quarter.
Subject headings, Library of Congress.
Also available in 16 mm. microfilm.
Library of Congress subject headings
Library of Congress subject headings