Signum
L - Education
1 670
H - Social Science
590
P - Language and Literature
323
B - Philosophy, Psychology, Religion
276
Q - Science
250
R - Medicine
224
T - Technology
162
Z - Library Science
138
G - Geography, Anthropology, Recreation
109
K - Law
89
A - General Works
64
N - Fine Arts
60
J - Political Science
58
D - World History
56
F - General American History
47
S - Agriculture
47
C - Historical Sciences
38
M - Music
35
E - United States History
29
U - Military Science
2