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Amos, Arturo J. A New Species of Ancillotoechia from the Zapla Formation, Northern Argentina. Arthuro J.Amos and S.Noirat. In In:DUTRO, J.T.(ed.) Paleozoic Perspectives : A Paleontological Tribute to G.Arthur Cooper. Washington : Smithsonian Institution, 1971, In:DUTRO, J.T.(ed.) Paleozoic Perspectives : A Paleontological Tribute to G.Arthur Cooper. S.139-142, : .Smithsonian Contrib. Paleobiol., 1971, 3.
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