Signum
H - Social Science
16 813
P - Language and Literature
8 766
L - Education
7 186
R - Medicine
7 156
B - Philosophy, Psychology, Religion
6 830
Q - Science
6 798
K - Law
5 783
T - Technology
5 232
J - Political Science
3 557
S - Agriculture
3 551
G - Geography, Anthropology, Recreation
2 805
F - General American History
2 310
N - Fine Arts
1 705
D - World History
1 588
Z - Library Science
823
C - Historical Sciences
543
A - General Works
492
M - Music
394
E - United States History
201
U - Military Science
148
V - Naval Science
30