Classification
M - Music
456
D - World History
208
Q - Science
86
B - Philosophy, Psychology, Religion
84
P - Language and Literature
66
H - Social Science
39
S - Agriculture
27
A - General Works
26
F - General American History
23
N - Fine Arts
23
G - Geography, Anthropology, Recreation
20
J - Political Science
17
K - Law
16
C - Historical Sciences
11
T - Technology
9
E - United States History
7
R - Medicine
5
L - Education
3