Iowa. Bureau of Labor Statistics. (1920). The State Free Employment Bureau: Co-operating as the State-Federal Employment Service ; including farm wage data for biennium ending June 30, 1920. State of Iowa.
Citace podle Chicago (17th ed.)Iowa. Bureau of Labor Statistics. The State Free Employment Bureau: Co-operating as the State-Federal Employment Service ; Including Farm Wage Data for Biennium Ending June 30, 1920. Des Moines: State of Iowa, 1920.
Citace podle MLA (8th ed.)Iowa. Bureau of Labor Statistics. The State Free Employment Bureau: Co-operating as the State-Federal Employment Service ; Including Farm Wage Data for Biennium Ending June 30, 1920. State of Iowa, 1920.
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