Classification
P - Language and Literature
61
D - World History
44
B - Philosophy, Psychology, Religion
10
K - Law
10
H - Social Science
7
C - Historical Sciences
4
A - General Works
2
L - Education
2
N - Fine Arts
2
F - General American History
1
G - Geography, Anthropology, Recreation
1
J - Political Science
1
M - Music
1
Q - Science
1
R - Medicine
1