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III—Über die innere Organisation und Stammesgeschichte einiger irregulärer Seeigel der obern Kreide. (On the Internal Structure and Phylogeny of some Irregular Sea-urchins of the Upper Chalk.) DrFranz Klinghardt Von. Jena, 1911.
Published online by Cambridge University Press: 01 May 2009
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- Copyright © Cambridge University Press 1912