Shimmin, Sylvia. <br/><br/>
Payment by results :  a psychological experiment / 
by Sylvia Shimmin in collaboration with Joan E. Williams and L.J. Buck. 
 - London :  Staples Press,  [1959] 
<br/><br/>Bibliography: p. 155-157. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wages -- Premium plan.--Wages -- Premium plan.<br/>Bonus system.