Fatigue of workers    Its relations to industrial production 

 - NA  NA         1941 
<br/><br/><label>Standard No.: </label>136,188 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ECONOMICS
<br/><br/><label>Dewey Class. No.: </label>X9:9434, H1