Signum
F - General American History
4 418
E - United States History
2 609
G - Geography, Anthropology, Recreation
2 194
P - Language and Literature
2 124
K - Law
1 134
H - Social Science
1 053
Z - Library Science
803
M - Music
613
N - Fine Arts
478
A - General Works
441
B - Philosophy, Psychology, Religion
441
C - Historical Sciences
396
T - Technology
386
S - Agriculture
352
L - Education
326
J - Political Science
313
Q - Science
268
R - Medicine
220
D - World History
80
U - Military Science
52
V - Naval Science
40