TY  - BOOK
AU  - Hart, Michael H
AU  - Zuckerman, Ben
TI  - Extraterrestrials--where are they?
SN  - 9780521448031
SN  - 94043739
U1  - 574.99 ZUC 
PY  - 1995///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Extraterrestrial beings - Congresses
KW  - Life - Origin - Congresses
N1  - Includes bibliographical reference and index
ER  -