TY  - BOOK
AU  - Abell,George Ogden,1927-
AU  - Morrison,David
AU  - Wolff,Sidney C.
TI  - Exploration of the universe
PY  - 1993///
CY  - Philadelphia
PB  - Saunders College Pub
KW  - Astronomy
N1  - Includes appendices and index
ER  -