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1by Smith, Norman D, Barrett, Peter J, Woolfe, Ken JGet access
Published in Palaeogeography, Palaeoclimatology, Palaeoecology (1998)
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2by Feldmann, Rodney M., Tshudy, Dale M., Thomson, Michael R. A.Get access
Published in Journal of Paleontology (1993)
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Article in Journal/Newspaper