Catalogue North American mammals with drawings and proof of plates (U. cinereoargenteus & U. littoralis skull).jpg
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Catalogue North American mammals with drawings and proof of plates (U. cinereoargenteus & U. littoralis skull), Robert Metzeroth, Urocyon cinereoargenteus anatomy
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Catalogue North American mammals with drawings and proof of plates (U. cinereoargenteus & U. littoralis skull), Gray fox and Channel Islands fox skulls
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図面とプレートの証明を持つ北米の哺乳類(U. cinereoargenteus & U. littoralis頭蓋骨)、Robert Metzeroth、 Urocyon cinereoargenteusの解剖学的構造
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図面とプレートの証明が付いた北米の哺乳類(U. cinereoargenteus & U. littoralis頭蓋骨、ハイギツネ、チャンネル諸島のキツネの頭蓋骨
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grey fox strong contrast urocyon