Combined indexes to the Library of Congress Classification schedules, 1974
Washington,
U.S. Historical Documents Institute
1975
5 sets in 15 volumes.
set 1 )2 vols( Author/ Number index.- set2 )3 vols.( Biographical subject index.- set3 )3 vols.( Classified index to persons.- set4 )1 v.( Geogrephical name index.- set 5 )6 vols.( Subject keyword index