TY  - BOOK
AU  - Abell, George O.
AU  - Morrison, David
AU  - Wolff, Sidney C.
TI  - Exploration of the universe
SN  - 0030946662
U1  - HS Cir 520 A34 1991 
PY  - 1991///
CY  - Philadelphia
PB  - Saunders College Publishing
KW  - Astronomy
N1  - Includes index
ER  -