Study of sidero-silicosis problem in an iron oremine / 
edited by C. Bandyopadhyay and A. Dhar 
 - Dhanbad :  Central Mining Research Station,  1972 
 - 36 p. ;  21 cm. 
 - Reference Central Mining Research Station-H4/54 ; .
<br/><br/>Include bibliography-p.20 
<br/><br/><label>Dewey Class. No.: </label>622.(54)