Classification
P - Language and Literature
127
D - World History
52
K - Law
21
B - Philosophy, Psychology, Religion
17
H - Social Science
7
C - Historical Sciences
4
J - Political Science
3
M - Music
3
A - General Works
2
L - Education
2
N - Fine Arts
2
F - General American History
1
G - Geography, Anthropology, Recreation
1
Q - Science
1
R - Medicine
1