00930cam a2200265 4500 83038402 TxAuBib 20110824120000.0 830202s1983||||||||||||||||||||||||eng|u 83002336 9780870444593 hard $19.95 087044459X hard $19.95 (OCoLC)9281897 DLC DLC DLC TxAuBib Ballard, Robert D. Exploring our living planet / [by Robert D. Ballard ; prepared by National Geographic Book Service.]. Washington, D.C. : National Geographic Society, 1983. 366 p. : col. ill. ; 29 cm. Includes index. Bibliography: p. 359. 20110824. Plate tectonics. National Geographic Society (U.S.), Book Division. TXALB