Classification
F - General American History
119
D - World History
34
S - Agriculture
12
H - Social Science
7
B - Philosophy, Psychology, Religion
3
M - Music
3
C - Historical Sciences
2
L - Education
2
R - Medicine
2
T - Technology
2
A - General Works
1
E - United States History
1
G - Geography, Anthropology, Recreation
1
P - Language and Literature
1
Z - Library Science
1