TY  - BOOK
AU  - Powers,Robert M.
AU  - Jensen,Helen Zane
TI  - Planetary encounters
SN  - 0811712702 :
AV  - QB 602.9 .P6
PY  - 1978///
CY  - Harrisburg, Pa.
PB  - Stackpole Books
KW  - Planets
KW  - Exploration
KW  - Astronautics
N1  - Bibliography: p. 283-284
ER  -