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[文献書誌] Umezaki, M., Yamauchi, T., Ohtsuka, R.: "Time alllocation to subsistence activities among the Huli in rural and urban Papua New Guinea"Journal of Biosocial Science. 34. 133-137 (2002)
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[文献書誌] Umezaki, M., Natsuhara, K., Ohtsuka, R.: "Protein content and amino acid scores of sweet potatoes in Papua New Guinea Highlands"Ecology of Food and Nutrition. 40. 471-480 (2001)
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[文献書誌] Pahari, K., Umezaki, M., Ohtsuka, R.: "Land use dynamics in Tari basin of Papua New Guinea using multi sensor satellite data"Proceedings of 22nd Asian Conference on Remote Sensing. 2. 798-801 (2001)
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[文献書誌] 大塚柳太郎(編著): "ニューギニア-錯綜する伝統と近代"京都大学出版会. 246 (2002)