版4th ed., with supplementary pages.
一般注記First ed. published in 1902 by the Classification Division of the Library of Congress.
"Additions and changes to October 1964": 61 p. at end.
Kept up to date by the Division's L.C. classification--additions and changes, and by an irregular cumulative publication issued by Gale Research Company, entitled Library of Congress classification schedules: a cumulation of additions and changes, Class Z.