TY  - BOOK
AU  - Schaaf, Fred
TI  - Comet of the century: from Halley to Hale-Bopp
SN  - 0-387-94793-0
PY  - 1997///
CY  - New York
PB  - Copernicus Books
KW  - Comet Hale-Bopp
KW  - Comet Halley
KW  - Comets
ER  -