Classification
P - Language and Literature
122
Q - Science
122
D - World History
100
H - Social Science
31
T - Technology
29
G - Geography, Anthropology, Recreation
17
Z - Library Science
15
S - Agriculture
14
A - General Works
13
B - Philosophy, Psychology, Religion
13
N - Fine Arts
13
K - Law
11
C - Historical Sciences
7
J - Political Science
5
R - Medicine
4
L - Education
2
M - Music
2
E - United States History
1
F - General American History
1