Extraterrestrial Cause for the Cretaceous-Tertiary Extinction
Author(s): Luis W. Alvarez, Walter Alvarez, Frank Asaro and Helen V. Michel
Source: Science, New Series, Vol. 208, No. 4448 (Jun. 6, 1980), pp. 1095-1108
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/1683699 .
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