Classification
D - World History
20
C - Historical Sciences
11
P - Language and Literature
9
J - Political Science
8
Q - Science
7
E - United States History
4
F - General American History
4
L - Education
4
A - General Works
3
H - Social Science
3
M - Music
3
R - Medicine
2
K - Law
1
N - Fine Arts
1
U - Military Science
1
Z - Library Science
1