Classification
H - Social Science
59
D - World History
32
M - Music
25
R - Medicine
12
C - Historical Sciences
10
B - Philosophy, Psychology, Religion
9
G - Geography, Anthropology, Recreation
7
J - Political Science
6
Q - Science
3
T - Technology
3
F - General American History
2
K - Law
2
L - Education
2
P - Language and Literature
2
Z - Library Science
2
S - Agriculture
1