Classification
M - Music
4,273
H - Social Science
2,406
E - United States History
2,133
S - Agriculture
2,070
D - World History
1,972
K - Law
1,726
C - Historical Sciences
1,227
B - Philosophy, Psychology, Religion
1,135
F - General American History
945
Z - Library Science
850
J - Political Science
548
P - Language and Literature
445
A - General Works
399
T - Technology
388
R - Medicine
359
Q - Science
348
L - Education
226
G - Geography, Anthropology, Recreation
109
U - Military Science
96
N - Fine Arts
58
V - Naval Science
21