International standard classification of occupations / International Labour Office.

Eitemau Tebyg

• The social grading of occupations : a new approach and scale /
  gan: Goldthorpe, John H.
  Cyhoeddwyd: (1974)
• International standard classifications of occupations.
  Cyhoeddwyd: (1958)
• Australian standard classification of occupations : conversion list, 1987 /
  Cyhoeddwyd: (1987)
• Classification of occupations and directory of occupational titles.
  Cyhoeddwyd: (1972)
• A link between the occupation classification codes of the 1966, 1971, 1976 and 1981 population censuses /
  gan: Mackay, K. R. (Keith Robin)
  Cyhoeddwyd: (1984)