Ryan Thomas Arthur <br/><br/>
Work and effort   The paychology of production    
Ryan Thomas Arthur 
 -  1947 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Production Economics
<br/><br/><label>Dewey Class. No.: </label>X:20S, H7