A social-economic grouping of gainful workers in cities of 500,000 or more: 1930..
A social-economic grouping of gainful workers in cities of 500,000 or more: 1930..
March 11, 1938
Details
- OL Work ID
- OL10831306W
Subjects
Social conditionsIndustriesEconomic conditionsSocial surveysWorking classLaborLabor and laboring classes