Ward, W., G. Keller, W. Stinnesbeck, and T. Adatte. 1995. “Yucatán Subsurface Stratigraphy: Implications and Constraints for the Chicxulub Impact”. Geology 23: 873-76. doi:10.1130/0091-7613(1995)023<0873:YNSSIA>2.3.CO;2.
W. Ward
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W.
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Ward