Classification
H - Social Science
89
S - Agriculture
55
M - Music
29
D - World History
24
J - Political Science
17
K - Law
17
Q - Science
10
C - Historical Sciences
7
G - Geography, Anthropology, Recreation
7
F - General American History
6
Z - Library Science
6
L - Education
5
T - Technology
5
A - General Works
3
P - Language and Literature
2
R - Medicine
2
B - Philosophy, Psychology, Religion
1
E - United States History
1
N - Fine Arts
1
U - Military Science
1