Classification
R - Medicine
133
H - Social Science
84
K - Law
43
T - Technology
40
M - Music
34
D - World History
20
S - Agriculture
12
L - Education
11
Q - Science
8
F - General American History
7
J - Political Science
6
C - Historical Sciences
5
E - United States History
5
A - General Works
4
B - Philosophy, Psychology, Religion
3
P - Language and Literature
3
G - Geography, Anthropology, Recreation
2
U - Military Science
2
Z - Library Science
1