Tandanand, Sathit. <br/><br/>
Development of a mechanical roof breaker for ground control in longwall operations under massive roof 
by Sathit Tandanand. 
 - Washington  Dept. of the Interior, Bureau of Mines  1979. 
 - 20 p.  ill.  27 cm. 
 - Report of investigations - United States Department of the Interior, Bureau of mines  8416 .
 - Report of investigations (United States. Bureau of Mines)  8416. .
<br/><br/>Bibliography: p. 17-18. 
<br/><br/><label>LCCN: </label>79018531  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ground control (Mining)<br/>Rock mechanics
<br/><br/><label>LC Class. No.: </label>TN23  TN288  / .U43 no. 8416 
<br/><br/><label>Dewey Class. No.: </label>622/.08 s  622/.26 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 28.23:8416