Signum
H - Social Science
8 489
R - Medicine
4 423
L - Education
4 383
Q - Science
4 168
P - Language and Literature
3 401
S - Agriculture
3 056
B - Philosophy, Psychology, Religion
2 957
T - Technology
2 756
K - Law
2 055
J - Political Science
1 612
G - Geography, Anthropology, Recreation
1 130
F - General American History
714
N - Fine Arts
700
D - World History
518
Z - Library Science
505
A - General Works
406
C - Historical Sciences
295
E - United States History
87
M - Music
85
U - Military Science
56
V - Naval Science
7