Classification
D - World History
230
R - Medicine
85
Q - Science
52
G - Geography, Anthropology, Recreation
29
B - Philosophy, Psychology, Religion
13
P - Language and Literature
7
C - Historical Sciences
6
M - Music
6
S - Agriculture
6
A - General Works
5
E - United States History
5
T - Technology
5
K - Law
3
V - Naval Science
3
F - General American History
2
J - Political Science
1