Classification
D - World History
14
K - Law
14
C - Historical Sciences
9
Z - Library Science
9
E - United States History
8
H - Social Science
6
J - Political Science
6
B - Philosophy, Psychology, Religion
3
A - General Works
2
F - General American History
1
L - Education
1
P - Language and Literature
1
R - Medicine
1
U - Military Science
1