Peng S S <br/><br/>
Coal mine ground control 

 -  1978 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>47882 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology
<br/><br/><label>Dewey Class. No.: </label>Hz:5, L8