CLASSIFICATION
Q - Science
123
H - Social Science
34
S - Agriculture
20
T - Technology
16
R - Medicine
15
G - Geography, Anthropology, Recreation
10
D - World History
4
B - Philosophy, Psychology, Religion
3
C - Historical Sciences
3
F - General American History
2
N - Fine Arts
2
P - Language and Literature
2
Z - Library Science
2
A - General Works
1
L - Education
1
M - Music
1