Classification
R - Medicine
67
T - Technology
67
H - Social Science
60
Q - Science
55
S - Agriculture
52
B - Philosophy, Psychology, Religion
21
M - Music
15
G - Geography, Anthropology, Recreation
14
P - Language and Literature
13
Z - Library Science
12
D - World History
10
N - Fine Arts
10
E - United States History
7
K - Law
7
C - Historical Sciences
6
L - Education
5
A - General Works
4
J - Political Science
4
F - General American History
2
U - Military Science
1