International Commission on Zoological Nomenclature. (1963). Opinion 650 Graptolite generic names: validation of certain emendations under the Plenary Powers. Bulletin of Zoological Nomenclature. 20(2): 105-110.
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International Commission on Zoological Nomenclature
1963
Opinion 650 Graptolite generic names: validation of certain emendations under the Plenary Powers