Classification
F - General American History
72
E - United States History
48
K - Law
19
D - World History
18
M - Music
18
H - Social Science
17
J - Political Science
14
S - Agriculture
14
A - General Works
13
P - Language and Literature
7
B - Philosophy, Psychology, Religion
3
Q - Science
3
T - Technology
3
C - Historical Sciences
2
L - Education
2
N - Fine Arts
1
R - Medicine
1
U - Military Science
1