HQ - Family, Marriage, Women 31
HM - Sociology 23
HD - Industries, Land Use, Labor 22
HN - Social History and Conditions 21
HX - Socialism, Communism, Anarchism 21
HV - Social Pathology, Criminology 19
HG - Finance 13
HB - Economic Theory and Demography 12
HC - Economic History and Conditions 12
HF - Commerce 12
H - Social Science 6
HT - Communities, Classes, Races 5
HJ - Public Finance 3
HS - Societies 1