00000cam a22000004a 4500 UP-1685594773861264329 Buklod 20070906150653.0 i|||||||||||||| | ta 070906s1996 xx d r |||| u| 0201489503 (iLib)UPBAG-00000013981 QB 721 L42 1996 Lewis, John S. Rain of iron and ice the very real threat of comet and asteroid bombardment John S. Lewis. Reading, Mass. Addison-Wesley c1996. xi, 236 p. ill. 24 cm Helix books Includes bibliographical references (p. 223) and index. Comets Environmental aspects. Asteroids Environmental aspects. Impact. UPBAG UPBAG-MAIN QB 721 L42 1996 Book