Free-floating subdivisions an alphabetical index

Library of Congress subject headings

Library of Congress subject headings

Library of Congress subject headings. free-floating subdivisions, genre/form headings, children's subject headings

Library of Congress classification. Q. Science

Library of Congress classification. T. Technology

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

Table of contents only

Library of Congress classification. L. Education