Classification
L - Education
52
K - Law
10
E - United States History
7
Z - Library Science
5
A - General Works
4
D - World History
3
H - Social Science
2
J - Political Science
2
Q - Science
2
B - Philosophy, Psychology, Religion
1
C - Historical Sciences
1
M - Music
1
P - Language and Literature
1
S - Agriculture
1