Classification
H - Social Science
121
T - Technology
115
Q - Science
77
R - Medicine
56
S - Agriculture
56
L - Education
27
D - World History
24
B - Philosophy, Psychology, Religion
16
M - Music
15
P - Language and Literature
15
J - Political Science
14
E - United States History
13
G - Geography, Anthropology, Recreation
10
A - General Works
6
Z - Library Science
6
F - General American History
5
K - Law
3
N - Fine Arts
3
C - Historical Sciences
2
U - Military Science
1