Classification
T - Technology
251
P - Language and Literature
92
F - General American History
52
H - Social Science
50
R - Medicine
42
B - Philosophy, Psychology, Religion
34
D - World History
27
K - Law
26
A - General Works
22
C - Historical Sciences
20
E - United States History
18
M - Music
14
U - Military Science
13
J - Political Science
12
Q - Science
12
S - Agriculture
8
Z - Library Science
4
L - Education
2
G - Geography, Anthropology, Recreation
1