Signum
P - Language and Literature
9 245
H - Social Science
8 059
R - Medicine
3 317
Q - Science
2 910
T - Technology
2 890
B - Philosophy, Psychology, Religion
2 592
D - World History
2 123
F - General American History
1 725
L - Education
1 700
K - Law
1 694
J - Political Science
1 241
G - Geography, Anthropology, Recreation
867
N - Fine Arts
759
A - General Works
517
S - Agriculture
431
Z - Library Science
410
M - Music
277
E - United States History
273
C - Historical Sciences
178
U - Military Science
149
V - Naval Science
44