Classification
F - General American History
42
Z - Library Science
41
M - Music
36
E - United States History
29
S - Agriculture
23
A - General Works
22
K - Law
18
H - Social Science
15
R - Medicine
15
N - Fine Arts
14
C - Historical Sciences
11
J - Political Science
8
P - Language and Literature
8
B - Philosophy, Psychology, Religion
6
D - World History
6
L - Education
5
T - Technology
4