Rotroff, Virgil H. <br/><br/>
Work measurement 
by Virgil H. Rotroff 
 - New York  Reinhold  1959 
 - 203p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Measurement --Work
<br/><br/><label>Dewey Class. No.: </label>T83 R746