Classification
D - World History
1,544
G - Geography, Anthropology, Recreation
365
R - Medicine
365
P - Language and Literature
282
M - Music
252
C - Historical Sciences
204
B - Philosophy, Psychology, Religion
201
N - Fine Arts
174
F - General American History
143
E - United States History
93
A - General Works
81
Z - Library Science
19
Q - Science
16
T - Technology
12
H - Social Science
11
S - Agriculture
10
J - Political Science
4
U - Military Science
3
V - Naval Science
3
K - Law
2