Lowery, Stewart M...[et al.]. <br/><br/>
Time and motion study and formulas forwage incentives 

 - 3rd ed. 
 - New York  mc Graw hill book company  1940 
 - xiii, 432p. 
<br/><br/><label>Subjects--Index Terms: </label>Time study  Motion study 
<br/><br/><label>Dewey Class. No.: </label>658.542  / LOW