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Author/Creator
- Library of Congress. Subject Cataloging Division[remove]12
- Gale Research Company2
- Library of Congress. Classification Division. Classification. Outline scheme of classes2
- Library of Congress1
- Library of Congress. Classification Division. Classification. Class L: Education1
- Library of Congress. Classification Division. Classification. Class B, part I, B-BJ: Philosophy1
- Library of Congress. Classification Division. Classification. Class D: Universal and Old World history1
- Library of Congress. Classification Division. Classification. Class J: Political science1
- Library of Congress. Classification Division. Classification. Class Q: Science1
- Library of Congress. Classification Division. Classification. Class S: Agriculture1