Occupations
- 1990 census of population and housing. Subject summary tape file (SSTF) 22 earnings by occupation and education.
- Revised Dictionary of occupational titles.
- The vanishing trades
- TopicIndex
- Verzeichnis der personlichen Berufe, Umsteigeschlussel 1970/1980/1990 Repertoire des professions, liste de conversion 1970/1980/1990 = Elenco delle professioni, lista di conversione 1980/1990 /