Classification
P - Language and Literature
15,493
Q - Science
142
K - Law
78
H - Social Science
49
B - Philosophy, Psychology, Religion
39
D - World History
30
N - Fine Arts
17
R - Medicine
16
T - Technology
13
M - Music
12
A - General Works
11
G - Geography, Anthropology, Recreation
10
J - Political Science
8
L - Education
5
S - Agriculture
3
F - General American History
1
V - Naval Science
1