Indian standards institution <br/><br/>
Indian standard: size analysis of coal and coke for marketing / 
Indian standards institution 
 - New Delhi,   Indian standards institution  1979 
 - 11p  ill;  21cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal
<br/><br/><label>Dewey Class. No.: </label>662.6  / IND