Classification
M - Music
8,730
H - Social Science
4,723
D - World History
2,791
B - Philosophy, Psychology, Religion
1,419
P - Language and Literature
1,078
C - Historical Sciences
770
S - Agriculture
717
J - Political Science
650
L - Education
628
A - General Works
616
T - Technology
477
N - Fine Arts
403
R - Medicine
399
K - Law
355
G - Geography, Anthropology, Recreation
340
Q - Science
332
Z - Library Science
293
F - General American History
256
E - United States History
180
U - Military Science
68
V - Naval Science
16