The Penguin Book of the physical world / co-ordinating editors, Sonya Larkin, Louise Bernbaum - Harmondsworth : Penguin, 1976 - 181 p. : ill. (chiefly col.), col. charts, col. maps, ports. (some col.) ; 21 cm. ISBN: 0140037136 Subjects--Topical Terms: ScienceGeophysics