Classification
H - Social Science
23
Q - Science
22
S - Agriculture
14
D - World History
11
J - Political Science
8
T - Technology
7
K - Law
5
A - General Works
4
Z - Library Science
4
M - Music
3
R - Medicine
3
B - Philosophy, Psychology, Religion
2
C - Historical Sciences
1
F - General American History
1
G - Geography, Anthropology, Recreation
1
L - Education
1
N - Fine Arts
1
P - Language and Literature
1