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.. (1957) ( : Arkell W.J. 1957. Mesozoic Ammonoidea. R.C. Moore (Ed.). Treatise on Invertebrate Paleonrology. Part L, Mollusca 4, Cephalopoda, Ammonoidea. The Geological Society of America, The University of Kansas Press. New York, Lawrence. p.L 80-L 490. Univ. Kansas Press.)



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