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Shoshana Ashkenazi, Yoram Yom-Tov, Herons and Fish Farming in the Huleh Valley, Israel: Conflict or Mutual Benefit?, Colonial Waterbirds, Vol. 19, Special Publication 1: Ecology, Conservation, and Management of Colonial Waterbirds in the Mediterranean Region (1996), pp. 143-151
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Ashkenazi et al. (1996) studied this question.
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