Signum
H - Social Science
4 295
R - Medicine
2 481
Q - Science
1 812
T - Technology
1 508
P - Language and Literature
534
L - Education
523
K - Law
479
B - Philosophy, Psychology, Religion
373
G - Geography, Anthropology, Recreation
350
D - World History
318
S - Agriculture
303
Z - Library Science
205
J - Political Science
203
A - General Works
147
N - Fine Arts
120
E - United States History
109
M - Music
93
F - General American History
91
U - Military Science
88
C - Historical Sciences
44
V - Naval Science
27