Classification
K - Law
70
D - World History
42
M - Music
32
H - Social Science
30
R - Medicine
17
S - Agriculture
16
Q - Science
15
L - Education
12
T - Technology
9
A - General Works
7
F - General American History
5
B - Philosophy, Psychology, Religion
3
E - United States History
3
G - Geography, Anthropology, Recreation
3
P - Language and Literature
3
J - Political Science
1