Signum
D - World History
4 386
H - Social Science
2 363
P - Language and Literature
1 959
N - Fine Arts
1 912
B - Philosophy, Psychology, Religion
981
M - Music
908
J - Political Science
578
Q - Science
566
T - Technology
310
G - Geography, Anthropology, Recreation
303
Z - Library Science
230
A - General Works
199
L - Education
165
R - Medicine
149
C - Historical Sciences
144
K - Law
123
U - Military Science
111
S - Agriculture
90
F - General American History
85
V - Naval Science
67
E - United States History
59