HA - Statistics 3,454
HB - Economic Theory and Demography 17,004
HC - Economic History and Conditions 27,079
HD - Industries, Land Use, Labor 41,107
HE - Transportation and Communications 2,887
HF - Commerce 23,135
HG - Finance 10,037
HJ - Public Finance 3,158
HM - Sociology 8,214
HN - Social History and Conditions 5,309
HQ - Family, Marriage, Women 11,011
H - Social Science 4,088
HS - Societies 191
HT - Communities, Classes, Races 4,980
HV - Social Pathology, Criminology 8,555
HX - Socialism, Communism, Anarchism 1,405