Fourth International Gondwana Symposium, Calcutta, January 17-22, 1977 / 
by M.M.J.W.Herath 
 - London :  Commonwealth Geological Liaison Office,  1977 
 - 6 p. ;  30 cm. 
<br/><br/><label>ISBN: </label>X920046087 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology