TY  - BOOK
AU  - Zeilik, Michael and Smith, Elske V. P.
TI  - Introductory astronomy and astrophysics
SN  - 0030229049
U1  - 520 
PY  - 1987///
CY  - New York
PB  - Saunders College Publishing
KW  - Astronomy
KW  - Astrophysics
ER  -