How the shortage of skilled mechanics is being overcome by training the unskilled

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

《How the shortage of skilled mechanics is being overcome by training the unskilled》，United States. Council of National Defense. Committee on Labor. Section on Industrial Training for the War Emergency。这是一部关于历史、战争、文学的公版作品，适合在安静的片刻里慢慢读下去。