TY  - BOOK
AU  - Sagan,Carl
TI  - Pale blue dot: a vision of the human future in space 
SN  - 0679764860
PY  - 1994///]
CY  - New York
PB  - Random House
KW  - Outer space
KW  - Exploration
KW  - Astronomy
N1  - References : page [406]-411
ER  -