Classification
Q - Science
236
R - Medicine
87
P - Language and Literature
76
B - Philosophy, Psychology, Religion
47
M - Music
40
D - World History
34
C - Historical Sciences
27
S - Agriculture
17
A - General Works
10
F - General American History
6
E - United States History
5
H - Social Science
2
T - Technology
1
Z - Library Science
1