Task force on industrial (non-metallic) minerals 

 - Delhi  Manager of publication India      1972 
 - 256p.  cm. 
<br/><br/><label>Standard No.: </label>88003 
<br/><br/><label>Source: </label> Reports 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Minings
<br/><br/><label>Dewey Class. No.: </label>"X9(HZ).2.N7, L2"