Saxena, N. C. <br/><br/>
Design of friction props / 
N. C. Saxena and Dr. B. Singh 
 - Dhanbad :  Central Mining Research Station,  1967 
 - 20 p. :  ill. ;  21 cm. 
 - Reference CMRS-M13/32 .
<br/><br/><label>Dewey Class. No.: </label>622.(54)