XXIV International Geological Congress :  Third Circular. March, 1972 = XXIV Congres Geologique International. 

 - Ontario :  Harpell's Press Co-opérative,  1972. 
 - 59 p. ;  23 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geología<br/>Circular
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Actaconf
<br/><br/><label>Universal Decimal Class. No.: </label>H 061.3