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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Hemming, Francis. - International Commission on Zoological Nomenclature - Colloquium on Zoological Nomenclature Copenhagen, Denmark - International Congress of Zoology Copenhagen, Denmark).
    Edition: "2nd ed."
    Publication info: London, Printed by order of the International Trust for Zoological Nomenclature, 1957
    Holding Institution: American Museum of Natural History Library