Classification
H - Social Science
9,272
M - Music
5,135
T - Technology
3,965
D - World History
3,792
Q - Science
3,614
S - Agriculture
3,484
R - Medicine
2,935
P - Language and Literature
2,925
F - General American History
2,031
B - Philosophy, Psychology, Religion
1,889
A - General Works
1,785
Z - Library Science
1,229
L - Education
1,125
J - Political Science
1,091
K - Law
938
N - Fine Arts
876
G - Geography, Anthropology, Recreation
719
E - United States History
406
U - Military Science
227
C - Historical Sciences
226
V - Naval Science
78