Classification
Q - Science
693
T - Technology
39
A - General Works
16
L - Education
14
P - Language and Literature
13
B - Philosophy, Psychology, Religion
12
C - Historical Sciences
10
S - Agriculture
8
R - Medicine
6
H - Social Science
5
E - United States History
3
F - General American History
1
G - Geography, Anthropology, Recreation
1
M - Music
1
Z - Library Science
1