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1by Jacobson, Stephen R., Askin, Rosemary A.Get access
Published in The Paleontological Society Special Publications (1992)
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2by Moldowan, J. Michael, Fago, Frederick J., Lee, Cathy Y., Jacobson, Stephen R., Watt, David S., Slougui, Nacer-Eddine, Jeganathan, Alwarsamy, Young, Donald C.Get access
Published in Science (1990)
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Article in Journal/Newspaper