Classification
R - Medicine
230
B - Philosophy, Psychology, Religion
94
D - World History
32
A - General Works
19
C - Historical Sciences
7
H - Social Science
4
Q - Science
4
G - Geography, Anthropology, Recreation
3
E - United States History
2
L - Education
2
F - General American History
1
N - Fine Arts
1
P - Language and Literature
1
S - Agriculture
1
T - Technology
1
U - Military Science
1