Library of Congress Classification:Class H, subclass HB -- Economic Theory and Demography
Library of Congress Classification:Class H, subclass HE -- Transportation and Communications
Library of Congress Classification:Class H, subclass HS -- Societies
Library of Congress Classification:Class H, subclass HD -- Industries, Land Use, and Labor
Library of Congress Classification:Class H, subclass HM -- Sociology (General)
Library of Congress Classification:Class H, subclass HQ -- Family, Marriage, Woman, and Sexuality
Library of Congress Classification:Class H, subclass HF -- Commerce
Library of Congress Classification:Class H, subclass HJ -- Public Finance
Library of Congress Classification:Class H, subclass HV -- Social Pathology, Social and Public Welfare, and Criminology
Library of Congress Classification:Class H -- Social sciences
Library of Congress Classification:Class H, subclass HG -- Finance