Signum
H - Social Science
18 718
P - Language and Literature
10 040
K - Law
8 213
L - Education
8 163
Q - Science
7 909
R - Medicine
7 805
B - Philosophy, Psychology, Religion
7 296
T - Technology
6 052
J - Political Science
4 461
S - Agriculture
3 808
G - Geography, Anthropology, Recreation
3 258
F - General American History
2 779
D - World History
1 854
N - Fine Arts
1 840
Z - Library Science
989
C - Historical Sciences
644
A - General Works
540
M - Music
441
E - United States History
215
U - Military Science
172
V - Naval Science
31