Classification
D - World History
160
Q - Science
45
H - Social Science
42
J - Political Science
35
A - General Works
34
T - Technology
24
S - Agriculture
13
K - Law
12
M - Music
12
R - Medicine
12
B - Philosophy, Psychology, Religion
11
Z - Library Science
11
P - Language and Literature
9
N - Fine Arts
8
C - Historical Sciences
7
G - Geography, Anthropology, Recreation
4
F - General American History
3
E - United States History
1
L - Education
1
U - Military Science
1
V - Naval Science
1