Classification
P - Language and Literature
108
H - Social Science
54
R - Medicine
54
B - Philosophy, Psychology, Religion
45
C - Historical Sciences
33
A - General Works
27
T - Technology
24
M - Music
22
Q - Science
16
D - World History
14
F - General American History
7
K - Law
6
S - Agriculture
6
Z - Library Science
6
E - United States History
4
G - Geography, Anthropology, Recreation
3
N - Fine Arts
3
L - Education
2
J - Political Science
1