A social-economic grouping of the gainful workers of the United States
Gainful workers of 1930 in social-economic groups, by color, nativity, age, and sex, and by industry, with comparative statistics for 1920 and 1910
by United States. Bureau of the Census · 1938

No description available.
Social conditionsIndustriesLabor and laboring classesEconomic conditionsSocial surveysStatisticsEmployeesWorking class