Ogg, James G. 1952- The concise geologic time scale / James G. Ogg, Gabi Ogg and Felix M. Gradstein. - Cambridge, UK : Cambridge University Press, 2008. - 177 p. : ill. (chiefly col.), maps ; 26 cm. Includes bibliographical references and index. ISBN: 0521898498 (hbk.) 9780521898492 (hbk.) : RM141.20 Subjects--Topical Terms: Geological time.Geology, Stratigraphic.