Alvarez L. W., Alvarez W., Asaro F., and Michel H. (1980)
Extraterrestrial cause for the
Cretaceous-Tertiary extinction. Science, 208, 1095-1108.
Grieve, R. 1990. Impact Cratering on the Earth.
Scientific American, April, p.66.
Grieve, R., J. Rupert, J. Smith, and A. Therriault.
1995. The record of Terrestrial impact cratering. GSA Today,
v5no10(Oct):192.
Jansa, L., M-P Aubry, and F. Gradstein. 1990. Comets
and extinctions; Cause and effect? Geological Soc. of Amer. Special
Paper 247:223, eds. Sharpton and Ward.
Marvin, Ursula B. 1990. Impact and its revolutionary
implications for geology. Geological Soc. of Amer. Special Paper
247:147, eds. Sharpton and Ward.
McLaren, D. J. and Goodfellow, W. D. Geological and
biological consequences of giant impacts. Annu. Rev. Earth Planet. Sci.
1990. 18:123-71.
Sleep, N., K. Zahnle, J. Kasting, and H. Morowitz.
1989. Annilhilation of ecosystems by large asteroid impacts on the early
Earth. Nature 342:139, 9 Nov.
Stanley, S. Extinction. Scientific American Library,
New York, 242p.