First ed. published in 1910 by the Classification Division."Additions and changes to April 1966": 81 p. at end.Kept up to date by the Division's L. C....
First ed. published in 1910 by the Classification Division.
"Additions and changes to April 1966": 81 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 R.