Classification
P - Language and Literature
14,873
H - Social Science
274
K - Law
90
B - Philosophy, Psychology, Religion
61
D - World History
44
Q - Science
39
G - Geography, Anthropology, Recreation
22
M - Music
20
N - Fine Arts
18
J - Political Science
17
L - Education
17
R - Medicine
9
T - Technology
9
Z - Library Science
5
F - General American History
4
S - Agriculture
4
C - Historical Sciences
3
A - General Works
2
E - United States History
2
U - Military Science
1