Kept up to date by the division's L.C. classification--additions and changes, and by two publications irregularly issued by Gale Research Company enti...
Kept up to date by the division's L.C. classification--additions and changes, and by two publications irregularly issued by Gale Research Company entitled: Library of Congress classification schedules--a cumulation of additions and changes, Class Q and Library of Congress classification schedules combined with additions and changes.