Classification
D - World History
83
M - Music
25
P - Language and Literature
18
C - Historical Sciences
15
F - General American History
11
N - Fine Arts
8
A - General Works
7
G - Geography, Anthropology, Recreation
6
E - United States History
3
T - Technology
3
B - Philosophy, Psychology, Religion
2
Z - Library Science
2
H - Social Science
1
J - Political Science
1
K - Law
1
Q - Science
1
R - Medicine
1
S - Agriculture
1