Classified index of occupations and industries 1950 census of population.

Библиографические подробности
Соавтор:	U.S. Bureau of the Census
Формат:	‌
Язык:	English
Опубликовано:	Washington U.S. Govt. Print. Off. 1950.
Предметы:	Occupations. United States > Occupations.