Symposium on underground rock chambers :  Held during the asce national meeting on water resources engineering, phoenix, arizona, january 13-14, 1971. 

 - 600 páginas 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mecánica de rocas<br/>Construcciones subterráneas--Congresos
<br/><br/><label>LC Class. No.: </label>TA712  / S941971