Catalog Index By LC Categories
- H - Social sciences (General)
- HA - Statistics
- HB - Economic theory. Demography
- HC - Economic history and conditions
- HD - Industries. Land use. Labor
- HE - Transportation and communications
- HF - Commerce
- HG - Finance
- HJ - Public finance
- HM - Sociology (General)
- HN - Social history and conditions. Social problems. Social reform
- HQ - The family. Marriage. Women
- HS - Societies: secret, benevolent, etc.
- HT - Communities. Classes. Races
- HV - Social pathology. Social and public welfare. Criminology
- HX - Socialism. Communism. Anarchism