A - General Works
85
B - Philosophy, Psychology, Religion
5,736
C - Historical Sciences
238
D - World History
2,536
E - United States History
233
F - General American History
2,610
G - Geography, Anthropology, Recreation
1,509
H - Social Science
9,422
J - Political Science
2,064
K - Law
6,486
L - Education
3,802
M - Music
583
N - Fine Arts
1,666
P - Language and Literature
14,941
Q - Science
2,554
R - Medicine
2,548
S - Agriculture
361
T - Technology
2,305
U - Military Science
100
V - Naval Science
40
Z - Library Science
400
PQ - French, Italian, Spanish, Portuguese Literature 9,465
PN - General Literature 1,977
P - Philology and Linguistics 791
PC - Romanic Languages 704
PS - American Literature 597
PR - English Literature 407
PA - Latin and Greek 204
PZ - Fiction 189
PT - European, Asian and African Literature 180
PG - Slavic, Baltic, Abanian Languages 112
PL - Eastern Asia, Africa, Oceania 78
PJ - Oriental 70
PM - Hyperborean, Indian, and Artificial Languages 70
PE - English Languages 38
PH - Uralic, Basque Languages 24
PK - Indo-Iranian 20
PF - West Germanic Languages 8
PB - Modern and Celtic Languages 7