TY  - BOOK
AU  - Abell, George O.
AU  - Morrison, David.
AU  - Wolff, Sidney C.
TI  - Exploration of the universe
SN  - 9780030946660
AV  - QB 45 .A24 1991 
PY  - 1991///
CY  - London
PB  - Saunders college publishing
KW  - Astronomy
ER  -