Classification
M - Music
136
G - Geography, Anthropology, Recreation
110
R - Medicine
50
Q - Science
34
D - World History
31
F - General American History
25
E - United States History
20
P - Language and Literature
20
H - Social Science
18
B - Philosophy, Psychology, Religion
17
T - Technology
15
C - Historical Sciences
10
A - General Works
6
Z - Library Science
5
S - Agriculture
4
J - Political Science
1