Classification
P - Language and Literature
214
H - Social Science
60
D - World History
33
Q - Science
32
S - Agriculture
24
G - Geography, Anthropology, Recreation
22
J - Political Science
19
B - Philosophy, Psychology, Religion
12
R - Medicine
10
M - Music
8
K - Law
7
T - Technology
4
L - Education
3
N - Fine Arts
3
A - General Works
2
E - United States History
2
C - Historical Sciences
1
U - Military Science
1