Classification
H - Social Science
86
T - Technology
61
D - World History
59
S - Agriculture
57
P - Language and Literature
35
Q - Science
35
A - General Works
18
L - Education
18
Z - Library Science
11
R - Medicine
9
G - Geography, Anthropology, Recreation
8
K - Law
8
C - Historical Sciences
7
M - Music
7
U - Military Science
7
N - Fine Arts
6
B - Philosophy, Psychology, Religion
5
J - Political Science
5
F - General American History
4
V - Naval Science
2