Classification
P - Language and Literature
16,527
H - Social Science
105
B - Philosophy, Psychology, Religion
100
K - Law
93
D - World History
67
Q - Science
57
N - Fine Arts
39
M - Music
22
R - Medicine
20
J - Political Science
16
L - Education
11
G - Geography, Anthropology, Recreation
10
S - Agriculture
9
T - Technology
7
A - General Works
4
C - Historical Sciences
4
Z - Library Science
4
E - United States History
2
U - Military Science
2
F - General American History
1