Classification
P - Language and Literature
5,852
Q - Science
210
H - Social Science
173
B - Philosophy, Psychology, Religion
146
R - Medicine
67
D - World History
63
N - Fine Arts
49
M - Music
25
G - Geography, Anthropology, Recreation
19
T - Technology
19
A - General Works
10
J - Political Science
10
L - Education
6
S - Agriculture
6
C - Historical Sciences
5
Z - Library Science
5
F - General American History
4
U - Military Science
2
E - United States History
1