A - General Works 6,947
B - Philosophy, Psychology, Religion 101,300
C - Historical Sciences 5,775
D - World History 65,727
E - United States History 183,708
F - General American History 15,302
G - Geography, Anthropology, Recreation 18,204
H - Social Science 108,277
J - Political Science 25,861
K - Law 19,556
L - Education 21,808
M - Music 91,680
N - Fine Arts 61,311
P - Language and Literature 160,132
Q - Science 61,253
R - Medicine 32,280
S - Agriculture 8,334
T - Technology 30,103
U - Military Science 4,763
V - Naval Science 1,635
Z - Library Science 5,355
DS - Asia 15,570
D - General History 12,400
DA - Great Britain 9,077
DT - Africa 4,170
DC - France, Andorra, Monaco 3,873
DG - Italy, Malta 3,459
DK - Russia, Soviet Union, Former Soviet Republics, Poland 3,311
DD - Germany 2,511
DF - Greece 1,935
DP - Spain, Portugal 1,325
DR - Balkan Peninsula 1,077
DU - Oceania (South Seas) 988
DB - Austria, Liechtenstein, Hungary, Czechoslovakia 676
DE - Grecco-Roman World 362
DL - Northern Europe, Scandinavia 310
DH - Low Countries 198
DJK - Eastern Europe (General) 188
DJ - Netherlands (Holland) 144
DQ - Switzerland 80
DX - Gypsies 79
DAW - Central Europe 27