Classification
Z - Library Science
65
D - World History
64
R - Medicine
56
Q - Science
34
H - Social Science
12
B - Philosophy, Psychology, Religion
11
G - Geography, Anthropology, Recreation
7
P - Language and Literature
6
A - General Works
5
F - General American History
5
S - Agriculture
4
E - United States History
3
C - Historical Sciences
2
M - Music
1
T - Technology
1