TY  - GEN
AU  - Whipple, Fred L.
AU  - Green, Daniel, W.E.
TI  - The Mystery of comets
SN  - 0521324408
PY  - 1985///
CY  - Cambridge
PB  - CUP
KW  - COMETS
KW  - ASTRONOMY
KW  - SOLAR SYSTEM
ER  -