Barnes, Ralph Mosser, <br/><br/>
Motion and time study :  design and measurement of work / 
Ralph Mosser Barnes. 
 - 5a ed. 
 - 739 páginas 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Estudio de movimientos.<br/>Estudio de tiempos.
<br/><br/><label>Dewey Class. No.: </label>658.54  / R261m 1963