Classification
S - Agriculture
1,699
M - Music
1,055
H - Social Science
998
L - Education
155
D - World History
80
T - Technology
72
K - Law
67
J - Political Science
65
Q - Science
56
F - General American History
52
G - Geography, Anthropology, Recreation
41
B - Philosophy, Psychology, Religion
36
Z - Library Science
21
P - Language and Literature
19
U - Military Science
12
E - United States History
11
N - Fine Arts
11
R - Medicine
10
A - General Works
6
V - Naval Science
4
C - Historical Sciences
1