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1Academic Journal
المصدر: Journal of Biogeography, 1999 Jul 01. 26(4), 825-841.
URL الوصول: https://www.jstor.org/stable/2656181
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2Academic Journal
المؤلفون: Kelt, Douglas A., Brown, James H., Heske, Edward J., Marquet, Pablo A., Morton, Stephen R., rogovin, Kontantín A., Shenbrot, Georgy
المصدر: Ecology, 1996 Apr 01. 77(3), 746-761.
URL الوصول: https://www.jstor.org/stable/2265499