Moebs, Noel N. <br/><br/>
Geotechnology in slate quarry operations / 
by Noel N. Moebs, Gary P. Sames, and Thomas E. Marshall. 
 - [Pittsburgh, Pa.] :  U.S. Dept. of the Interior, Bureau of Mines,  [1985] 
 - ii, 38 p. :  ill. ;  28 cm. 
 - Bureau of Mines report of investigations ;  9009 .
 - Report of investigations (United States. Bureau of Mines) ;  9009. .
<br/><br/>Bibliography: p. 35-37. 
<br/><br/><label>LCCN: </label>85600255  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ground control (Mining)--Pennsylvania--Pen Argyl Region.<br/>Slate--Pennsylvania--Pen Argyl Region.<br/>Quarries and quarrying--Pennsylvania--Pen Argyl Region.
<br/><br/><label>LC Class. No.: </label>TN23  TN288  / .U43 no. 9009 
<br/><br/><label>Dewey Class. No.: </label>622 s  622/.354