Signum
S - Agriculture
204
B - Philosophy, Psychology, Religion
157
H - Social Science
99
T - Technology
80
L - Education
63
Q - Science
43
N - Fine Arts
41
J - Political Science
21
P - Language and Literature
17
A - General Works
12
R - Medicine
7
Z - Library Science
7
G - Geography, Anthropology, Recreation
4
K - Law
4
C - Historical Sciences
1
E - United States History
1