Classification
Q - Science
76
D - World History
53
J - Political Science
53
P - Language and Literature
51
T - Technology
48
E - United States History
42
H - Social Science
41
L - Education
9
A - General Works
8
N - Fine Arts
4
C - Historical Sciences
3
F - General American History
3
K - Law
3
B - Philosophy, Psychology, Religion
2
M - Music
2
Z - Library Science
2
S - Agriculture
1