Classification
P - Language and Literature
17,252
Q - Science
406
K - Law
294
H - Social Science
263
B - Philosophy, Psychology, Religion
140
D - World History
97
R - Medicine
93
N - Fine Arts
47
G - Geography, Anthropology, Recreation
32
T - Technology
29
L - Education
28
M - Music
28
J - Political Science
26
S - Agriculture
18
U - Military Science
5
Z - Library Science
5
E - United States History
4
F - General American History
4
A - General Works
3
C - Historical Sciences
1
V - Naval Science
1