Classification
H - Social Science
350
D - World History
143
M - Music
97
S - Agriculture
74
P - Language and Literature
60
K - Law
47
Q - Science
32
T - Technology
32
L - Education
27
B - Philosophy, Psychology, Religion
25
Z - Library Science
23
C - Historical Sciences
22
A - General Works
19
N - Fine Arts
19
R - Medicine
19
G - Geography, Anthropology, Recreation
17
J - Political Science
17
E - United States History
10
F - General American History
6
U - Military Science
2