Geological magazine : Vol. 137 Iss. 1-6 Year. 2000 - Herts Mimram Books Ltd. 1966 - [V.P.] ill. 29.5cm x 21cm BJ - 6 ISSN: 00167568 13594656 Subjects--Topical Terms: Earth science Dewey Class. No.: 550 / GEO