A - General Works 6,947
B - Philosophy, Psychology, Religion 101,300
C - Historical Sciences 5,775
D - World History 65,727
E - United States History 183,707
F - General American History 15,302
G - Geography, Anthropology, Recreation 18,204
H - Social Science 108,277
J - Political Science 25,861
K - Law 19,556
L - Education 21,808
M - Music 91,673
N - Fine Arts 61,304
P - Language and Literature 160,124
Q - Science 61,253
R - Medicine 32,280
S - Agriculture 8,334
T - Technology 30,103
U - Military Science 4,763
V - Naval Science 1,635
Z - Library Science 5,355
HD - Industries, Land Use, Labor 21,638
HV - Social Pathology, Criminology 13,257
HQ - Family, Marriage, Women 12,937
HF - Commerce 11,996
HC - Economic History and Conditions 9,578
HM - Sociology 7,300
HG - Finance 6,934
HB - Economic Theory and Demography 6,337
HT - Communities, Classes, Races 5,245
HN - Social History and Conditions 4,536
HX - Socialism, Communism, Anarchism 2,114
HE - Transportation and Communications 1,778
HJ - Public Finance 1,624
H - Social Science 1,496
HA - Statistics 599
HS - Societies 220