TY  - BOOK
AU  - Hart, Micheal H., ed.
AU  - Zukerman, Ben, ed.
TI  - Extraterrestrials: where are they ?
SN  - 0-521-44335-0
PY  - 1995///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Extraterrestrial life
KW  - Galaxy
KW  - interstellar communication
ER  -