一般注記At head of title: Library of Congress.
Prepared originally by Dr. W. F. Koenig, under the supervision of Mr. Charles Martel.--Pref., signed: Clarence W. Perley, chief, Classification division.
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 P, PB-PH.