The stability of shallow tunnels and underground openings in cohesive material / 
by E. H. Davis ... [et al.] 
 - Sydney :  University of Sydney,  1980 
 - 20, 24 p. 
 - Research report ;  no. R364 .
 - Sydney.  University.  School of Civil Engineering.  Research report ;  no. R364 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Tunneling<br/>Structural stability