Classification
S - Agriculture
166
H - Social Science
140
F - General American History
62
M - Music
46
K - Law
44
D - World History
40
E - United States History
40
T - Technology
35
C - Historical Sciences
33
J - Political Science
28
Q - Science
16
B - Philosophy, Psychology, Religion
12
L - Education
12
R - Medicine
12
Z - Library Science
10
A - General Works
6
G - Geography, Anthropology, Recreation
6
P - Language and Literature
3
U - Military Science
2
N - Fine Arts
1