Classification
F - General American History
114
S - Agriculture
51
H - Social Science
44
T - Technology
13
M - Music
11
K - Law
8
R - Medicine
8
B - Philosophy, Psychology, Religion
7
A - General Works
6
D - World History
4
E - United States History
3
J - Political Science
3
Q - Science
3
Z - Library Science
3
C - Historical Sciences
2
L - Education
2
P - Language and Literature
2
N - Fine Arts
1