CLASSIFICATION
H - Social Science
18,410
T - Technology
1,245
Q - Science
838
K - Law
511
B - Philosophy, Psychology, Religion
232
L - Education
192
P - Language and Literature
142
D - World History
127
S - Agriculture
112
J - Political Science
106
Z - Library Science
80
F - General American History
62
R - Medicine
44
C - Historical Sciences
39
G - Geography, Anthropology, Recreation
37
N - Fine Arts
19
A - General Works
17
U - Military Science
11
E - United States History
10
V - Naval Science
5
M - Music
4