CLASSIFICATION
Q - Science
128
D - World History
76
H - Social Science
67
L - Education
49
S - Agriculture
38
J - Political Science
20
Z - Library Science
16
U - Military Science
10
G - Geography, Anthropology, Recreation
9
T - Technology
6
A - General Works
5
C - Historical Sciences
4
P - Language and Literature
4
F - General American History
3
K - Law
3
E - United States History
2
B - Philosophy, Psychology, Religion
1
R - Medicine
1