Walker .W.F  <br/><br/>
Engineering productivity Vol.I 

 - Bombay  B.I Publications  1963 
 - 257 
<br/><br/><br/>ENGLISH 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>Engg
<br/><br/><label>Dewey Class. No.: </label>621.9