Classification
H - Social Science
166
L - Education
11
T - Technology
11
J - Political Science
9
M - Music
9
R - Medicine
7
G - Geography, Anthropology, Recreation
6
Q - Science
4
D - World History
3
S - Agriculture
3
B - Philosophy, Psychology, Religion
2
N - Fine Arts
2
P - Language and Literature
2
A - General Works
1
C - Historical Sciences
1
F - General American History
1
U - Military Science
1