Classification
Q - Science
89
D - World History
88
A - General Works
52
S - Agriculture
36
T - Technology
28
P - Language and Literature
27
B - Philosophy, Psychology, Religion
26
L - Education
24
H - Social Science
23
R - Medicine
11
N - Fine Arts
7
M - Music
6
E - United States History
5
G - Geography, Anthropology, Recreation
4
K - Law
3
F - General American History
2
C - Historical Sciences
1