Classification
P - Language and Literature
454
R - Medicine
170
H - Social Science
126
B - Philosophy, Psychology, Religion
82
M - Music
56
C - Historical Sciences
45
A - General Works
44
K - Law
41
T - Technology
37
D - World History
31
Q - Science
30
S - Agriculture
20
F - General American History
10
G - Geography, Anthropology, Recreation
9
Z - Library Science
8
J - Political Science
5
L - Education
5
E - United States History
4
N - Fine Arts
3
U - Military Science
1