Classification
P - Language and Literature
12,434
Q - Science
929
H - Social Science
675
B - Philosophy, Psychology, Religion
527
R - Medicine
262
D - World History
261
K - Law
210
S - Agriculture
154
J - Political Science
132
T - Technology
131
L - Education
104
N - Fine Arts
82
G - Geography, Anthropology, Recreation
66
M - Music
25
A - General Works
20
U - Military Science
14
Z - Library Science
13
E - United States History
9
V - Naval Science
8
F - General American History
6
C - Historical Sciences
5