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Descriptive Monograph of the Ammonite genus Perisphinctes - IV—Monographische Beschreibung der Ammonitengattung Perisphinotes. By Dr. Jos. von Siemiradzki.Palæontographica, Bd. xlv (1899), pp. 69–352, pls. xx-xxvii.
Published online by Cambridge University Press: 01 May 2009
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- Copyright © Cambridge University Press 1899