Symposium  International Geological Congress / 
Congres Geologique International, twenty-fourth session, Canada, 1972 
 - Montreal :  s.n.,  1972 
 - 2 v. :  ill. ;  24 cm. 
<br/><br/><br/>engfre 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Congresses