Signum
D - World History
86
P - Language and Literature
75
H - Social Science
13
N - Fine Arts
13
B - Philosophy, Psychology, Religion
7
Q - Science
7
C - Historical Sciences
4
F - General American History
3
J - Political Science
3
M - Music
3
U - Military Science
3
G - Geography, Anthropology, Recreation
2
Z - Library Science
2
A - General Works
1
K - Law
1
L - Education
1
R - Medicine
1
S - Agriculture
1
T - Technology
1