Classification
S - Agriculture
810
H - Social Science
460
M - Music
110
C - Historical Sciences
28
D - World History
22
B - Philosophy, Psychology, Religion
15
F - General American History
13
E - United States History
11
L - Education
11
K - Law
10
J - Political Science
8
Z - Library Science
8
Q - Science
6
U - Military Science
6
G - Geography, Anthropology, Recreation
4
P - Language and Literature
4
T - Technology
4
A - General Works
3
N - Fine Arts
2
R - Medicine
1