Signum
G - Geography, Anthropology, Recreation
4 493
P - Language and Literature
3 502
F - General American History
3 476
H - Social Science
3 065
N - Fine Arts
1 768
K - Law
1 631
E - United States History
1 018
T - Technology
841
B - Philosophy, Psychology, Religion
707
L - Education
621
Z - Library Science
619
M - Music
562
Q - Science
535
S - Agriculture
444
R - Medicine
348
C - Historical Sciences
321
J - Political Science
317
A - General Works
178
D - World History
151
U - Military Science
58
V - Naval Science
10