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Subclass H: Social Sciences (General)
Subclass HB: Economic Theory. Demography
Subclass HC: Economic History
Subclass HD: Industries. Land Use. Labor
- HD28-70: Management
- HD101-1395: Land use
- HD1401-2210: Agriculture
- HD2321-4730: Industry
- HD4801-8943: Labor. Working class
- HD9000-9999: Special industries and trades
Subclass HE: Transportation and Communications
Subclass HJ: Public Finance
Subclass HM: Sociology (General)
Subclass HN: Social History and Conditions. Social Problems. Social Reform
Subclass HQ: The Family. Marriage. Women
- HQ12-472: Sexuality
- HQ503-1064: The family. Marriage. Home
- HQ1075: Sex role
- HQ1088-1090: Men
- HQ1101-2030: Women. Feminism
Subclass HS: Secret Societies
Subclass HT: Communities. Classes. Races
- HT101-395: Urban groups
- HT401-485: Rural groups
- HT601-1445: Classes
- HT680-690: Middle class
- For Working class, see HD4841+; HD4901
- HT851-1444: Slavery
- HT1501-1595: Races
Subclass HV: Crime. Social and public welfare. Poverty
- HV85-525: By region or country
- HV553-639: Relief in case of emergencies
- HV640-645: Refugee problems
- HV697-4959: Protection, assistance, and relief
- HV701-1420: Children
- HV1551-3024: People with disabilities
- HV4023-4470: Urban poor. Slums
- HV4701-4890: Animal welfare
- HV5001-5720: Alcoholism. Temperance reform
- HV5800-5840: Drug use
- HV6001-7220: Crime
- HV7231-9960: Criminal justice
Subclass HX: Socialism. Communism. Anarchism