Classification
D - World History
40
B - Philosophy, Psychology, Religion
39
H - Social Science
29
K - Law
28
M - Music
22
A - General Works
16
P - Language and Literature
13
L - Education
6
Q - Science
6
R - Medicine
6
E - United States History
5
F - General American History
5
S - Agriculture
5
G - Geography, Anthropology, Recreation
4
J - Political Science
3
N - Fine Arts
3
Z - Library Science
3
T - Technology
1