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Swisher CC, Grajales-Nishimura JM, Montanari A, et al. Coeval 40Ar/39Ar Ages of 65.0 Million Years Ago from Chicxulub Crater Melt Rock and Cretaceous-Tertiary Boundary Tektites. Science. 1992;257(5072):954-8doi: 10.1126/science.257.5072.954.
Swisher, C. C., Grajales-Nishimura, J. M., Montanari, A., Margolis, S. V., Claeys, P., Alvarez, W., Renne, P., Cedillo-Pardoa, E., Maurrasse, F. J., Curtis, G. H., Smit, J., & McWilliams, M. O. (1992). Coeval 40Ar/39Ar Ages of 65.0 Million Years Ago from Chicxulub Crater Melt Rock and Cretaceous-Tertiary Boundary Tektites. Science (New York, N.Y.), 257(5072), 954-8. https://doi.org/10.1126/science.257.5072.954
Swisher, C C, et al. "Coeval 40Ar/39Ar Ages of 65.0 Million Years Ago from Chicxulub Crater Melt Rock and Cretaceous-Tertiary Boundary Tektites." Science (New York, N.Y.) vol. 257,5072 (1992): 954-8. doi: https://doi.org/10.1126/science.257.5072.954
Swisher CC, Grajales-Nishimura JM, Montanari A, Margolis SV, Claeys P, Alvarez W, Renne P, Cedillo-Pardoa E, Maurrasse FJ, Curtis GH, Smit J, McWilliams MO. Coeval 40Ar/39Ar Ages of 65.0 Million Years Ago from Chicxulub Crater Melt Rock and Cretaceous-Tertiary Boundary Tektites. Science. 1992 Aug 14;257(5072):954-8. doi: 10.1126/science.257.5072.954. PMID: 17789640.
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