Classification
H - Social Science
20
F - General American History
18
K - Law
11
M - Music
9
J - Political Science
5
P - Language and Literature
4
D - World History
3
C - Historical Sciences
2
L - Education
2
A - General Works
1
B - Philosophy, Psychology, Religion
1
E - United States History
1
S - Agriculture
1
T - Technology
1