Classification
P - Language and Literature
133,283
M - Music
13,867
F - General American History
4,160
D - World History
3,432
A - General Works
3,271
Q - Science
3,255
H - Social Science
2,821
B - Philosophy, Psychology, Religion
2,680
K - Law
1,580
C - Historical Sciences
1,536
R - Medicine
1,426
J - Political Science
825
T - Technology
816
E - United States History
567
S - Agriculture
488
N - Fine Arts
478
G - Geography, Anthropology, Recreation
397
Z - Library Science
183
L - Education
175
U - Military Science
72
V - Naval Science
21