Classification
T - Technology
31
H - Social Science
30
F - General American History
16
M - Music
16
N - Fine Arts
16
P - Language and Literature
11
A - General Works
8
S - Agriculture
8
G - Geography, Anthropology, Recreation
5
B - Philosophy, Psychology, Religion
4
C - Historical Sciences
4
D - World History
4
L - Education
3
E - United States History
2
Q - Science
2
R - Medicine
2