CLASSIFICATION
Q - Science
711
S - Agriculture
36
L - Education
28
A - General Works
25
C - Historical Sciences
11
G - Geography, Anthropology, Recreation
10
Z - Library Science
9
R - Medicine
7
F - General American History
3
D - World History
2
M - Music
2
E - United States History
1
H - Social Science
1
P - Language and Literature
1
T - Technology
1