Classification
P - Language and Literature
16,523
H - Social Science
105
B - Philosophy, Psychology, Religion
99
K - Law
93
D - World History
65
Q - Science
57
N - Fine Arts
38
M - Music
21
R - Medicine
20
J - Political Science
16
L - Education
11
G - Geography, Anthropology, Recreation
10
S - Agriculture
9
T - Technology
7
C - Historical Sciences
4
Z - Library Science
4
A - General Works
3
E - United States History
2
U - Military Science
2
F - General American History
1