Press, Frank Understanding earth / Frank Press and Raymond Siever - 3rd ed. - New York : W. H. Freeman & Co., c2001. - xxiii, 57 p. : ill., figs. ; 23 cm. ISBN: 0716735040 LCCN: Subjects--Topical Terms: Earth sciencesEarth LC Class. No.: QE28 / .P9 2001