Tandanand, Sathit. <br/><br/>
Development of a mechanical roof breaker for ground control in longwall operations under massive roof / 
by Sathit Tandanand. 
 - Washington :  U.S. Dept. of the Interior, Bureau of Mines,  1979. 
 - 20 p. :  ill. 
 - Report of investigations ;  8416 .
 - United States.  Bureau of Mines.  Report of investigations ;  8416 .
 - Report of investigations (United States. Bureau of Mines) ;  8416. .
<br/><br/><label>LCCN: </label>79018531  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ground control (Mining)<br/>Rock mechanics.