Classification
P - Language and Literature
29
Q - Science
25
D - World History
23
N - Fine Arts
6
H - Social Science
5
S - Agriculture
5
T - Technology
4
G - Geography, Anthropology, Recreation
3
C - Historical Sciences
2
M - Music
2
Z - Library Science
2
A - General Works
1
B - Philosophy, Psychology, Religion
1
E - United States History
1
J - Political Science
1
K - Law
1