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[文献書誌] 伊沢紘生(共著): "サル学の未来" 創造の世界. 105. 49-77 (1998)
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[文献書誌] 伊沢紘生: "クモザルを群れる-離合集散型社会の内側" モンキー. 42-1・2. 3-15 (1998)
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[文献書誌] 伊沢紘生: "アマゾンにさぐるチンパンジー社会の起源" サイアス(Scias). 44. 34-35 (1998)
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[文献書誌] 伊沢紘生: "ヤシの種子散布者クモザルの功罪" 日本熱帯生態学会ニューズレター. 32. 1-6 (1998)
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[文献書誌] 伊沢紘生: "アマゾンにチンパンジー社会の起源を求めて" 遺伝. 53-3. 64-67 (1999)
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[文献書誌] KOSEI IZAWA: "Social changes within a group of wild black-capped capuchins VI" Field Studies of Fauna and Flora,La Macarena,Col.13. 1-6 (1999)
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[文献書誌] KOSEI IZAWA: "Social Changes within a group of Red-howler monkeys,VII" Field Studies of Fauna and Flora,La Macarena,Colombia. 13. 15-17 (1999)
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[文献書誌] KOSEI IZAWA: "A list of Animals which fed on fluit of a Fig-tree" Field Studies of Fauna and Flora,La Macarena,Colombia. 13. 25-30 (1999)
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[文献書誌] 西邨顕達: "野生ウーリーモンキー雌の交尾・生殖パターン" 霊長類研究. 14-3. 235-235 (1998)
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[文献書誌] AKISATO NISHIMURA: "Face-whitened disease observed in wild woolly monkeys,at La Macarena" Field Studies of Fauna and Flora,La Macarena,Colombia. 13. 7-13 (1999)
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[文献書誌] KOSHIN KIMURA: "Home ranges and lnter-group relationships among the wild red howler monkey" Field Studies of Fauna and Flora,La Macarena,Colombia. 13. 19-24 (1999)
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[文献書誌] MIKIO KOBAYASHI(共著): "Frugivore-dispersed seedlings of Milpeso palm,Ocrocarpus bataua,in the neotropical rain forest of La Macarena,Colombia" Field Studies of Fauna and Flora,La Macarena,Colombia. 13. 41-46 (1999)
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[文献書誌] AKIHIDE TAKEHARA(共著): "Vegetation succession on the flood plain of the Rio Duda,Colombian Amazon" Field Studies of Fauna and Flora,La Macarena,Colombia. 13. 31-40 (1999)
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[文献書誌] CARLOS MEJIA(共著): "Breeding Biology of Hoploxypterus cayanus at the Rio Duda" Field Studies of Fauna and Flora,La Macarena,Colombia. 12. 3-8 (1998)
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[文献書誌] AKIO TSUCHIYA(共著): "Vegetation recovery of drought deciduous forests,northeastern Brazil" 日本植生学誌. 15-2. 117-124 (1998)
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[文献書誌] AKIO TSUCHIYA(共著): "Forest bio mass and wood consumption in the lower course of Amazon" Acta Amazonica. 29-1(印刷中). (1999)
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[文献書誌] 伊沢紘生(共著): "「河合雅雄著作集第7巻・サルからヒトへの物語」p.409〜416" 小学館, 474 (1998)
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[文献書誌] AKISATO NISHIMURA(共): "「XVIIth Congres of the International Primatological Society」p.189" University of Antanariuo-Madagascar, 132 (1998)