CLASSIFICATION
L - Education
133
H - Social Science
81
Q - Science
37
G - Geography, Anthropology, Recreation
24
E - United States History
18
T - Technology
18
D - World History
15
F - General American History
14
S - Agriculture
10
N - Fine Arts
8
V - Naval Science
6
A - General Works
5
P - Language and Literature
5
R - Medicine
5
B - Philosophy, Psychology, Religion
4
K - Law
4
Z - Library Science
3
M - Music
2
C - Historical Sciences
1
J - Political Science
1
U - Military Science
1