Classification
P - Language and Literature
172
D - World History
90
G - Geography, Anthropology, Recreation
23
H - Social Science
17
F - General American History
10
K - Law
6
M - Music
5
B - Philosophy, Psychology, Religion
4
T - Technology
4
Q - Science
2
A - General Works
1
C - Historical Sciences
1
R - Medicine
1
S - Agriculture
1