ISBN 0521387655 books & textbook
A Geologic Time Scale 1989 (Cambridge Earth Science Series)
Harland, W. Brian Armstrong, Richard L. Cox, Allen V. Craig, Lorraine E. Smith, Alan G. Smith, David G.
Cambridge University Press /1990-06-29 Paperback / 279 Pages
isbn-10: 0521387655 / isbn-13: 9780521387651
