官方藏书 / United States. Council of National Defense. Committee on Labor. Section on Industrial Training for the War Emergency

United States. Council of National Defense. Committee on Labor. Section on Industrial Training for the War Emergency

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How the shortage of skilled mechanics is being overcome by training the unskilledUnited States. Council of National Defense. Committee on Labor. Section on Industrial Training for the War Emergency · Engineering_and_Technology · 5 章
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