Classification
H - Social Science
103
M - Music
33
D - World History
24
S - Agriculture
15
P - Language and Literature
8
T - Technology
7
B - Philosophy, Psychology, Religion
6
L - Education
6
C - Historical Sciences
5
J - Political Science
4
Z - Library Science
4
A - General Works
3
F - General American History
2
K - Law
2
Q - Science
2