Presgrave Ralph <br/><br/>
Dynamics of time study 

 - 3rd 
 - Toronto  Ryerson Press           1956 
 - xvii, 238p.  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Work Study
<br/><br/><label>Dewey Class. No.: </label>X:89M, J6