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Yardımcı Kaynaklar
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1. Climate and Water, Waggoner, P.E.,ed., 1989, New York: Harper &Row
2. The Future of the Oceans, Borgese, Elisabeth Mann., New York: Harvest House.
3.Safe Drinking Water Act: Amendments, Regulations and Standards, Calabrese, Edward J., et al., eds., 1989, New York: Lewis Publishers.
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