Classification
D - World History
98
M - Music
62
R - Medicine
25
B - Philosophy, Psychology, Religion
18
H - Social Science
15
P - Language and Literature
12
J - Political Science
10
K - Law
5
A - General Works
4
F - General American History
4
E - United States History
3
C - Historical Sciences
2
Z - Library Science
2
T - Technology
1