Classification
P - Language and Literature
13,048
Q - Science
167
S - Agriculture
161
H - Social Science
149
A - General Works
65
B - Philosophy, Psychology, Religion
65
D - World History
38
N - Fine Arts
21
R - Medicine
21
T - Technology
17
K - Law
15
J - Political Science
13
G - Geography, Anthropology, Recreation
12
L - Education
7
M - Music
6
Z - Library Science
5
C - Historical Sciences
2
E - United States History
2
U - Military Science
2
F - General American History
1