CLASSIFICATION
H - Social Science
49,718
L - Education
3,314
D - World History
1,209
Q - Science
1,030
J - Political Science
983
S - Agriculture
937
T - Technology
934
R - Medicine
931
F - General American History
779
K - Law
707
Z - Library Science
419
G - Geography, Anthropology, Recreation
288
P - Language and Literature
189
B - Philosophy, Psychology, Religion
154
A - General Works
130
U - Military Science
104
E - United States History
94
C - Historical Sciences
64
N - Fine Arts
30
V - Naval Science
8
M - Music
3