Classification
P - Language and Literature
344
C - Historical Sciences
98
Q - Science
80
B - Philosophy, Psychology, Religion
68
T - Technology
48
R - Medicine
28
D - World History
24
H - Social Science
23
A - General Works
22
F - General American History
10
M - Music
8
S - Agriculture
4
Z - Library Science
2
E - United States History
1
G - Geography, Anthropology, Recreation
1
V - Naval Science
1