Review of protection to the engineers steel file industry in Bombay 

 - Delhi  Manager of publications          1959 
 - iv,61p  cm. 
<br/><br/> App.: p31-49p 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X9(D6, 851) : 531.2.N58t, J9