Rock fall engineering 
Rock fall engineering 
 -  "xviii, 243 pages : illustrations ; 27 cm" 
 - Boca Raton  CRC Press/Taylor & Francis Group  2015 
<br/><br/><label>ISBN: </label>9781482219975 
<br/><br/><label>Dewey Class. No.: </label>624.15132 WYL  / 22.624.15132 WYL