Classification
H - Social Science
28
L - Education
9
D - World History
7
M - Music
6
C - Historical Sciences
4
K - Law
4
P - Language and Literature
3
R - Medicine
3
B - Philosophy, Psychology, Religion
2
G - Geography, Anthropology, Recreation
2
S - Agriculture
2
F - General American History
1
J - Political Science
1
U - Military Science
1