Kept up to date by the Office's L.C. classification--additions and changes, and by three publications irregularly issued by Gale Research, Inc. entitled: Library of Congress classification schedules--a cumulation of additions and changes, Class V; Library of Congress classification schedules--a cumulation of additions and changes, Classes U-V, Military and naval sciences (which updates also Class U, Military science); and Library of Congress classification schedules combined with additions and changes.
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