Classification
S - Agriculture
140
K - Law
116
J - Political Science
53
H - Social Science
49
E - United States History
45
Q - Science
12
D - World History
10
T - Technology
10
L - Education
7
A - General Works
5
F - General American History
4
Z - Library Science
4
C - Historical Sciences
2
M - Music
2
R - Medicine
2