Classification
H - Social Science
17
D - World History
12
S - Agriculture
11
B - Philosophy, Psychology, Religion
7
M - Music
6
C - Historical Sciences
4
R - Medicine
4
Z - Library Science
4
E - United States History
2
F - General American History
2
G - Geography, Anthropology, Recreation
2
P - Language and Literature
2
Q - Science
2
J - Political Science
1
N - Fine Arts
1
T - Technology
1