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[文献書誌] Hayama Sugio: "A functional role of the primates' glottis in arboreal life." PRIMATE RESEARCH. 5(2). 175 (1989)
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[文献書誌] Hayama Sugio and Sakura Hajime: "Regarding hyolaryngeal apparatus in primates,especially pongidae." J.Anthrop.Soc.Nippon. 98(2). 200 (1990)
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[文献書誌] 葉山 杉夫: "サル目の声門閉鎖機能に関する系統的研究" 京都大学霊長類研究所年報. 20. 57-58 (1990)
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[文献書誌] 葉山 杉夫: "サル目(霊長類)のロコモ-ション:二足歩行の起原と発達" 霊長類研究. 6(2). 117-120 (1990)
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[文献書誌] Hayama Sugio: "The Origin of Hominids' Vocal Organ." J.Anthrop.Soc.Nippon. 99(2). (1991)
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[文献書誌] Hayama Sugio: "The role of the laryngeal sphincteric function for arboreal life." PRIMATE RESEARCH. 7(2). (1991)
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[文献書誌] Hayama,Sugio: "FROM WHAT PERIOD DID THE FORMATION OF HUMAN GLOTTAL TONE ORIGINATE?" ELSEVIER,AMSTERDAM, (1991)
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[文献書誌] 葉山 杉夫: "「進化」のヒトの発声器官の進化の項を分担" 東京大学出版会・東京, (1991)