Classification
S - Agriculture
271
M - Music
181
H - Social Science
177
E - United States History
148
J - Political Science
112
D - World History
103
C - Historical Sciences
97
F - General American History
81
K - Law
77
B - Philosophy, Psychology, Religion
56
T - Technology
48
Z - Library Science
32
Q - Science
27
L - Education
20
A - General Works
14
R - Medicine
14
N - Fine Arts
9
P - Language and Literature
8
G - Geography, Anthropology, Recreation
6
U - Military Science
3