Shotcrete for underground support IV / 
Engineering Foundation 
 - New York, N.Y. :  Engineering Foundation,  1982 
 - 191 pages :  illustrations. 
<br/><br/> Selected papers presented at the 1982 Engineering Conference Paipa, Boyacá, Colombia 
<br/><br/><label>ISBN: </label>0939204274 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Construcciones subterráneas.<br/>Hormigón proyectado--Congresos.
<br/><br/><label>Dewey Class. No.: </label>624.19