Classification
M - Music
30
P - Language and Literature
17
A - General Works
14
R - Medicine
10
B - Philosophy, Psychology, Religion
6
E - United States History
5
K - Law
3
C - Historical Sciences
2
D - World History
2
H - Social Science
2
S - Agriculture
2
F - General American History
1
N - Fine Arts
1
Q - Science
1
U - Military Science
1