Phelps, Orme W. <br/><br/>
Introduction to labour economics / 
Orme W. Phelps 
 - New York :  Mc Graw-Hill,  1955 
 - 554 p. ;  23 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Labor and laboring classes