CLASSIFICATION
H - Social Science
18,441
T - Technology
1,244
Q - Science
836
K - Law
508
L - Education
283
B - Philosophy, Psychology, Religion
232
P - Language and Literature
137
D - World History
124
S - Agriculture
112
J - Political Science
106
Z - Library Science
80
F - General American History
62
C - Historical Sciences
50
V - Naval Science
48
R - Medicine
44
G - Geography, Anthropology, Recreation
36
N - Fine Arts
19
A - General Works
17
U - Military Science
11
E - United States History
10
M - Music
4