Signum
H - Social Science
4 633
R - Medicine
2 637
Q - Science
1 859
T - Technology
1 590
P - Language and Literature
675
L - Education
522
K - Law
513
D - World History
487
A - General Works
442
B - Philosophy, Psychology, Religion
379
G - Geography, Anthropology, Recreation
361
S - Agriculture
322
F - General American History
284
J - Political Science
227
Z - Library Science
210
N - Fine Arts
131
E - United States History
124
U - Military Science
101
M - Music
97
C - Historical Sciences
44
V - Naval Science
28