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![](./images/clear.gif) 1.- UNAM SCIENTIFIC DRILLING PROGRAM OF CHICXULUB IMPACT STRUCTURE; EVIDENCE FOR A 300 KILOMETER CRATER DIAMETER
AMERICAN GEOPHYSICAL UNION; WASHINGTON, DC; USA; UNITED STATES, 1996
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![](./images/clear.gif) 2.- UNAM SCIENTIFIC SHALLOW-DRILLING PROGRAM OF THE CHICXULUB IMPACT CRATER
WINSTON & SON; SILVER SPRING, MD; USA; UNITED STATES, 2000
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