Classification
D - World History
32
F - General American History
18
Q - Science
11
P - Language and Literature
10
R - Medicine
10
B - Philosophy, Psychology, Religion
9
C - Historical Sciences
8
G - Geography, Anthropology, Recreation
8
M - Music
7
H - Social Science
6
N - Fine Arts
6
A - General Works
4
S - Agriculture
4
T - Technology
3
Z - Library Science
2
E - United States History
1
J - Political Science
1
V - Naval Science
1