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1
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2Argitaratua 2012Gaiak “...United States. Environmental Protection Agency Evaluation....”
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6Argitaratua 1996GaiakLiburua
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10Argitaratua 1984Gaiak “...Environmental protection New Zealand Waahi, Lake....”
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13Argitaratua 2000GaiakLiburua
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14nork Shabecoff, Philip, 1934-Gaiak Table of contents only
Argitaratua 2003
Publisher description
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