A practical guide to Library of Congress classification حسب Snow, Karen 1977-

Library of Congress classification. Q. Science

Library of Congress classification. T. Technology

Library of Congress classification. S. Agriculture

Library of Congress classification. KL-KWX. Law of Asia and Eurasia, Africa, Pacific Area, and Antarctica

Library of Congress classification. R. Medicine

Library of Congress classification. DS-DX. History of Asia, Africa, Australia, New Zealand, etc.

Library of Congress classification. H. Social sciences

Library of Congress classification. J. Political science

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Library of Congress classification. L. Education