TY  - BOOK
AU  - Sagan,Carl
AU  - Druyan,Ann
TI  - El Cometa
SN  - 8408000128
U1  - 523.6 23
PY  - 1992///
CY  - Barcelona
PB  - Planeta, 
KW  - Comets
KW  - Halley's comet
N1  - Includes indexes; ELcometa carl Sagan - I
COSMOS 
II Ann Druyan
ER  -