CANADIEM NATIONLAL <br/><br/>
UNDERGROUND ROCK ENGINEERING  13TH CANDIAN ROCK MECHANICS SYPOSIUM 

 - 0 
 - CANADA  THE CANDIAN INSTITUTE  1980 
 - 225 pag.  28 cm 
 - 0  22 .
<br/><br/>MEASUREMENTS-HISTORIES ROCK MECHANICS 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CIENCIAS PURAS
<br/><br/><label>Dewey Class. No.: </label>552  / C23