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doi:10.11238/mammalianscience.54.299. Ōhata Kōji 大畑孝二 (1990). 折居彪二郎によるウトナイ湖の鳥類ほか観察記録 [Orii Hyōjirō's Records of Sightings of Birds &c. on Lake Utonai] (PDF)...
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Shinagawa Ward. Retrieved June 8, 2022. Hachisuka Masauji (1942). 日本人の手によつて記録された鳥類 [List of Birds Described by the Japanese Authors]. Tori (in English and Japanese)...
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