Classification
M - Music
13,472
S - Agriculture
3,470
H - Social Science
1,835
D - World History
494
A - General Works
328
B - Philosophy, Psychology, Religion
321
L - Education
294
P - Language and Literature
169
J - Political Science
164
F - General American History
161
T - Technology
142
K - Law
119
Q - Science
94
Z - Library Science
86
G - Geography, Anthropology, Recreation
78
E - United States History
45
N - Fine Arts
32
U - Military Science
32
C - Historical Sciences
29
R - Medicine
26
V - Naval Science
10