CLASSIFICATION
H - Social Science
4,787
D - World History
1,136
L - Education
285
E - United States History
269
J - Political Science
227
F - General American History
193
P - Language and Literature
183
G - Geography, Anthropology, Recreation
177
C - Historical Sciences
102
B - Philosophy, Psychology, Religion
76
V - Naval Science
72
A - General Works
63
R - Medicine
46
K - Law
30
T - Technology
28
S - Agriculture
20
N - Fine Arts
18
M - Music
15
U - Military Science
6
Z - Library Science
5
Q - Science
3