Urbanek, A.; Towe K.M. — Ultrastructural studies on Graptolites Part 1: The Periderm and its Derivatives in the Dendroidea and in Mastigograptus. Part 2: The Periderm and its Derivatives in the Graptoloidea
Smithsonian Institution Washington, DC 72, b/w illus.. . PB. 2 vols. Wrappers. Vg.. Smithsonian Contributions to Paleobiology No. 20 & 22..
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Numero libro:
S49121
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