TY  - BOOK
AU  - Morrison, David
AU  - Wolff, Sidney C.
TI  - Frontiers of astronomy
SN  - 0030303486
U1  - HS Cir 520.20 M831 1991 
PY  - 1990///
CY  - Philadelphia
PB  - Saunders College Publishing
KW  - Astronomy
N1  - Includes index
ER  -