CLASSIFICATION
S - Agriculture
321
H - Social Science
92
L - Education
49
A - General Works
18
Q - Science
15
C - Historical Sciences
7
G - Geography, Anthropology, Recreation
4
J - Political Science
3
K - Law
3
T - Technology
3
F - General American History
2
P - Language and Literature
2
Z - Library Science
2
D - World History
1
R - Medicine
1