Classification
P - Language and Literature
132
H - Social Science
46
D - World History
44
Q - Science
16
K - Law
13
B - Philosophy, Psychology, Religion
8
N - Fine Arts
7
A - General Works
4
C - Historical Sciences
4
J - Political Science
4
T - Technology
4
M - Music
2
S - Agriculture
2
F - General American History
1
G - Geography, Anthropology, Recreation
1
L - Education
1
R - Medicine
1