Godbole , N N  <br/><br/>
Manufacture of lead and slate pencils slates, plaster of paris, chalks, crayons and tailors' chalks  

 - 2nd ed.  
 - 91p.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemical technology 
<br/><br/><label>Subjects--Index Terms: </label>Pencils  
<br/><br/><label>Universal Decimal Class. No.: </label>667.56  / J3