HD - Industries, Land Use, Labor 14,490
HF - Commerce 9,967
HV - Social Pathology, Criminology 8,672
HQ - Family, Marriage, Women 6,841
HC - Economic History and Conditions 4,795
HG - Finance 4,632
HM - Sociology 4,374
HB - Economic Theory and Demography 2,940
HT - Communities, Classes, Races 2,279
HN - Social History and Conditions 2,117
HX - Socialism, Communism, Anarchism 1,036
HE - Transportation and Communications 1,029
HJ - Public Finance 768
H - Social Science 681
HA - Statistics 176
HS - Societies 85