Classification
M - Music
31
A - General Works
23
F - General American History
10
H - Social Science
3
S - Agriculture
3
D - World History
2
L - Education
2
T - Technology
2
B - Philosophy, Psychology, Religion
1
C - Historical Sciences
1
E - United States History
1
K - Law
1
P - Language and Literature
1
Q - Science
1
R - Medicine
1