Classification
K - Law
43
F - General American History
36
L - Education
22
S - Agriculture
20
H - Social Science
14
M - Music
13
J - Political Science
10
B - Philosophy, Psychology, Religion
8
E - United States History
7
G - Geography, Anthropology, Recreation
7
Z - Library Science
7
A - General Works
5
R - Medicine
5
P - Language and Literature
4
T - Technology
4
C - Historical Sciences
3
Q - Science
3
D - World History
2