United States. Bureau of the Census. (1960). Classified index of occupations and industries: 1960 census of population.
Chicago-viite (17. p.)United States. Bureau of the Census. Classified Index of Occupations and Industries: 1960 Census of Population. Washington, 1960.
MLA-viite (8. p.)United States. Bureau of the Census. Classified Index of Occupations and Industries: 1960 Census of Population. 1960.
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