Signum
H - Social Science
96
P - Language and Literature
73
Q - Science
55
R - Medicine
41
T - Technology
32
D - World History
30
K - Law
23
G - Geography, Anthropology, Recreation
20
B - Philosophy, Psychology, Religion
18
L - Education
16
J - Political Science
11
M - Music
9
N - Fine Arts
9
S - Agriculture
9
F - General American History
7
E - United States History
5
Z - Library Science
4
A - General Works
3
C - Historical Sciences
1
U - Military Science
1