Kept up to date by the Division's L.C. classification--additions and changes, and by an irregular cumulative publication issued by Gale Research Compa...
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 : combined with additions and changes through [year] : class H, social sciences, subclasses HM-HX, sociology (Title varies slightly)