Classification
E - United States History
1,323
D - World History
657
T - Technology
280
F - General American History
164
P - Language and Literature
102
C - Historical Sciences
74
H - Social Science
64
J - Political Science
38
L - Education
17
N - Fine Arts
16
G - Geography, Anthropology, Recreation
12
Q - Science
10
K - Law
3
Z - Library Science
2
B - Philosophy, Psychology, Religion
1
M - Music
1
R - Medicine
1