Jansa, Lubomir F.
Comets and extinctions: cause and effect? - Boulder, CO Geological Society of America 1990 - pp. 223-232 ilus. - Special Paper. Geological Society of America n.247 .
CATASTROFES
COMETAS
EXTINCION MASIVA
CANADA
NOVA SCOTIA
56.017.4/S47|14
Comets and extinctions: cause and effect? - Boulder, CO Geological Society of America 1990 - pp. 223-232 ilus. - Special Paper. Geological Society of America n.247 .
CATASTROFES
COMETAS
EXTINCION MASIVA
CANADA
NOVA SCOTIA
56.017.4/S47|14