T. N. Singh <br/><br/>
Equivalent material model study :  instrumentation / 
T. N. Singh and Dr. B. Singh 
 - Dhanbad :  Central Mining Research Station,  1966 
 - 13 p. :  ill. ;  21 cm. 
 - Reference Central Mining Research Station-M9/25 .
<br/><br/><label>Dewey Class. No.: </label>622.(54)