Aldorf, Josef <br/><br/>
Mine openings :  stability and support / 
Jospeh Aldorf and Karel Exner 
 - Amsterdam :  Elsevier scientific publishing company,  1986 
<br/><br/><label>ISBN: </label>0444995250 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ground control (Mining)<br/>Shaft Sinking
<br/><br/><label>Dewey Class. No.: </label>622.25  / ALD