Classification. Class C: Auxiliary sciences of history
1948; reissued 1967
5
Library of Congress. Subject Cataloging Division
Classification
1954; reprinted, 1966
6
Library of Congress. Subject Cataloging Division
Classification. Class H: Social sciences
1965
7
Library of Congress. Subject Cataloging Division
Classification
1951; reprinted, 1966
8
Library of Congress. Subject Cataloging Division
Classification
1922; reprinted 1962
9
Library of Congress. Subject Cataloging Division
Classification
1970
10
Library of Congress. Subject Cataloging Division
Classification. Class P, subclasses, PN, PR, PS, PZ: Literature (general), English and American literatures, fiction in English, juvenile literature (with supplementary pages)
1964
11
Library of Congress. Subject Cataloging Division
Classification
1965
12
Library of Congress. Subject Cataloging Division
Classification. Class T: technology
1971
13
Library of Congress. Subject Cataloging Division
Classification. History: Class D, General and Old World