Classification
M - Music
132
H - Social Science
42
C - Historical Sciences
23
T - Technology
21
D - World History
19
B - Philosophy, Psychology, Religion
11
L - Education
11
Q - Science
9
F - General American History
5
G - Geography, Anthropology, Recreation
5
R - Medicine
5
J - Political Science
4
P - Language and Literature
4
Z - Library Science
4
E - United States History
3
K - Law
3
S - Agriculture
3
A - General Works
1