00882cam a2200241 4500 1162752598 TxAuBib 20011009120000.0 000524s2001||||||||||||||||||||||||eng|u 00042706 9780761314035 lib. bdg. 0761314032 lib. bdg. DLC DLC TxAuBib Bortz, Alfred B. Collision course : cosmic impacts and life on earth / Fred Bortz. Brookfield, Conn : Millbrook Press, 2001. 72 p. : ill. (some col.) ; 24 cm. Includes bibliographical references and index. 20011009. Asteroids Collisions with Earth Juvenile literature. Comets Collisions with Earth Juvenile literature. TXKIP