Classification
R - Medicine
2,027
Q - Science
1,650
P - Language and Literature
918
B - Philosophy, Psychology, Religion
606
H - Social Science
549
T - Technology
282
A - General Works
278
C - Historical Sciences
136
D - World History
129
M - Music
71
E - United States History
65
S - Agriculture
44
G - Geography, Anthropology, Recreation
37
F - General American History
24
Z - Library Science
11
L - Education
9
J - Political Science
5
V - Naval Science
5
K - Law
2
N - Fine Arts
2
U - Military Science
2