Protection of Mountain Apiaries from Bears by Use of Electric Fence
作者： Tracy I. Storer , George H. Vansell , Ben D. Moses
DOI: 10.2307/3795661
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摘要: Nature often has woven a strange fabric of interrelations between various species animals and plants in the wild, nowadays some equally complex situations are arising field economic zoology where activities different touch diverse human interests. Thus, evolution agricultural crop production lowlands California now affected wild black bears Si-
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