Library of Congress classification schedules : a cumulation of additions and changes through 1992

Library of Congress classification schedules : a cumulation of additions and changes through 1991

Library of Congress classification schedules combined with additions and changes through 1991

Library of Congress classification schedules : a cumulation of additions and changes through 1990

Library of Congress classification schedules combined with additions and changes through 1988

Classification - Class Z : bibliography and library science

Classification - Class B, part I, B-BJ : philosophy

Classification - Class C : auxiliary sciences of history

Classification - class U : militany science

Classification - class M : music and books on music