TY  - BOOK
AU  - Gregory,Zeilik
TI  - Introductory astronomy & astrophysics
SN  - 9780030062285
U1  - 52 
PY  - 1998///
CY  - UK
PB  - Brools / cole cengage learning
KW  - ASTRONOMY
KW  - ASTROPHYSICS
ER  -