Sinha, J. K.  Dr. <br/><br/>
Scientific studies on mine supports / 
Dr. J. K. Sinha and P. R. Roy 
 - Dhanbad :  Central Mining Research Station,  1968 
 - 24 p. :  ill. ;  21 cm. 
 - Reference Central Mining Research Station-E4/45 .
<br/><br/><label>Dewey Class. No.: </label>622.(54)