Gondawana stratigraphy =    La estratigrafia del Gondwana :    IUGS Synposiu, Buenos Aires, 1-15 October 1967. 

 - Paris  :    UNESCO,    1967. 
 - p. :    ill. ;    28 cm. 
 - Earth Sciences = Ciencias de la tierra ;    2 .
<br/><br/>Includes bibliographical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Geology, Stratigraphic.