TY  - BOOK
AU  - Bortz,Alfred B.
TI  - Collision course!: cosmic impacts and life on earth 
SN  - 0761314032 :
AV  - QB377 .B67 2001
U1  - 523.44 21
PY  - 2001///
CY  - Brookfield, Conn.
PB  - Millbrook Press
KW  - Asteroids
KW  - Sears
KW  - Comets
KW  - Disasters
N1  - Includes bibliographical references (p. 68-69) and index; Accelerated Reader; 8.3; 2.0
N2  - Describes evidence of past cosmic collisions with the Earth, provides a history of the solar system, and discusses steps which can be taken to prevent a catastrophic collision in the future
ER  -