Classification
D - World History
44
B - Philosophy, Psychology, Religion
23
A - General Works
19
Q - Science
18
F - General American History
11
R - Medicine
10
E - United States History
9
H - Social Science
9
T - Technology
7
N - Fine Arts
6
S - Agriculture
6
J - Political Science
4
L - Education
4
U - Military Science
4
K - Law
3
M - Music
3
P - Language and Literature
3
C - Historical Sciences
2
Z - Library Science
2
G - Geography, Anthropology, Recreation
1