HF - Commerce 25
HD - Industries, Land Use, Labor 21
HB - Economic Theory and Demography 9
H - Social Science 5
HC - Economic History and Conditions 5
HT - Communities, Classes, Races 4
HN - Social History and Conditions 3
HQ - Family, Marriage, Women 3
HG - Finance 2
HV - Social Pathology, Criminology 2
HA - Statistics 1
HM - Sociology 1