Classification
R - Medicine
62
C - Historical Sciences
25
B - Philosophy, Psychology, Religion
20
Q - Science
20
S - Agriculture
16
H - Social Science
15
D - World History
9
G - Geography, Anthropology, Recreation
9
M - Music
7
A - General Works
5
E - United States History
3
J - Political Science
2
L - Education
2
F - General American History
1
N - Fine Arts
1
P - Language and Literature
1
T - Technology
1