Classification : class T : technology.
Library of Congress.Subject Cataloging Division.
Gale Research Company.
Washington : Library of Congress,
1971.
First ed. published in 1910 by the Classification Division.
Kept up to date by the Division's L.C. classification--additions and changes, and by two publications irregularly issued by Gale Research Company entitled: Library of Congress Classification schedules--a cumulation of additions and changes, Class T; and Library of Congress classification schedules combined with additions and changes.
Classification
Classification, Library of Congress.
Also issued online.