Classification
R - Medicine
681
Q - Science
489
S - Agriculture
367
H - Social Science
209
B - Philosophy, Psychology, Religion
192
T - Technology
185
P - Language and Literature
184
M - Music
108
D - World History
101
C - Historical Sciences
88
A - General Works
83
G - Geography, Anthropology, Recreation
74
L - Education
59
E - United States History
50
F - General American History
20
Z - Library Science
16
N - Fine Arts
15
J - Political Science
12
U - Military Science
6
K - Law
5