Signum
P - Language and Literature
8 432
H - Social Science
2 977
B - Philosophy, Psychology, Religion
2 151
D - World History
1 568
F - General American History
1 390
L - Education
1 101
K - Law
1 086
J - Political Science
980
Q - Science
782
N - Fine Arts
603
T - Technology
538
R - Medicine
474
G - Geography, Anthropology, Recreation
449
M - Music
171
Z - Library Science
155
E - United States History
148
C - Historical Sciences
119
S - Agriculture
84
U - Military Science
46
A - General Works
43
V - Naval Science
16