Classification
H - Social Science
5,723
M - Music
3,789
S - Agriculture
1,687
K - Law
1,220
J - Political Science
938
Q - Science
877
T - Technology
853
L - Education
664
D - World History
613
R - Medicine
490
Z - Library Science
389
F - General American History
352
P - Language and Literature
197
G - Geography, Anthropology, Recreation
191
A - General Works
184
N - Fine Arts
148
E - United States History
126
U - Military Science
116
B - Philosophy, Psychology, Religion
87
C - Historical Sciences
74
V - Naval Science
18