A - General Works
234
B - Philosophy, Psychology, Religion
5,940
C - Historical Sciences
273
D - World History
2,797
E - United States History
316
F - General American History
2,702
G - Geography, Anthropology, Recreation
1,682
H - Social Science
10,530
J - Political Science
2,201
K - Law
6,947
L - Education
4,063
M - Music
650
N - Fine Arts
1,738
P - Language and Literature
15,345
Q - Science
3,033
R - Medicine
3,227
S - Agriculture
481
T - Technology
2,653
U - Military Science
159
V - Naval Science
57
Z - Library Science
519
DP - Spain, Portugal 1,373
D - General History 436
DS - Asia 370
DT - Africa 103
DG - Italy, Malta 101
DK - Russia, Soviet Union, Former Soviet Republics, Poland 84
DC - France, Andorra, Monaco 76
DA - Great Britain 57
DD - Germany 42
DR - Balkan Peninsula 36
DF - Greece 34
DE - Grecco-Roman World 20
DL - Northern Europe, Scandinavia 20
DU - Oceania (South Seas) 13
DB - Austria, Liechtenstein, Hungary, Czechoslovakia 10
DX - Romanies 8
DJ - Netherlands (Holland) 4
DAW - Central Europe 3
DJK - Eastern Europe (General) 3
DH - Low Countries 2