Classification
H - Social Science
131
T - Technology
115
P - Language and Literature
39
M - Music
19
F - General American History
14
S - Agriculture
13
B - Philosophy, Psychology, Religion
10
C - Historical Sciences
7
D - World History
6
N - Fine Arts
5
A - General Works
4
K - Law
3
R - Medicine
3
Q - Science
2
E - United States History
1
G - Geography, Anthropology, Recreation
1