Classification
P - Language and Literature
18,781
H - Social Science
781
K - Law
525
Q - Science
400
B - Philosophy, Psychology, Religion
355
D - World History
299
J - Political Science
148
R - Medicine
127
N - Fine Arts
96
G - Geography, Anthropology, Recreation
87
L - Education
82
M - Music
67
S - Agriculture
51
T - Technology
26
U - Military Science
18
Z - Library Science
15
C - Historical Sciences
12
E - United States History
9
F - General American History
6
A - General Works
5