Classification
H - Social Science
8,895
M - Music
4,588
T - Technology
3,863
Q - Science
3,464
S - Agriculture
3,372
D - World History
3,231
R - Medicine
2,554
P - Language and Literature
2,430
F - General American History
2,014
B - Philosophy, Psychology, Religion
1,720
A - General Works
1,333
L - Education
1,112
J - Political Science
1,035
K - Law
897
Z - Library Science
891
N - Fine Arts
792
G - Geography, Anthropology, Recreation
573
E - United States History
270
U - Military Science
221
C - Historical Sciences
164
V - Naval Science
72