Signum
D - World History
854
P - Language and Literature
102
B - Philosophy, Psychology, Religion
83
G - Geography, Anthropology, Recreation
36
N - Fine Arts
35
H - Social Science
22
C - Historical Sciences
17
K - Law
10
A - General Works
9
E - United States History
6
Q - Science
6
T - Technology
6
S - Agriculture
5
J - Political Science
3
R - Medicine
3
Z - Library Science
3
L - Education
2
M - Music
2
F - General American History
1
U - Military Science
1