00999cam a2200325 4500 9790825 TxAuBib 20050711120000.0 ||||||s1994||||||||||||||||||||||||und|u 93004314 /AC 9781560061540 1560061545 9781565101548 1565101545 (OCoLC)28182825 TxAuBib Nardo, Don. The extinction of the dinosaurs / by Don Nardo. San Diego, CA : Lucent, 1994. 48 p : ill. (mostly col) ; 26 cm. Exploring the unknown Includes bibliographical references and index. Explores the many contradictory theories about what caused the dinosaurs to become extinct. 19691231. Dinosaurs. Extinction (Biology.) Prehistoric animals. Exploring the unknown. MRLJG