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      <marc:subfield code="a">Hecky, R. E.</marc:subfield>
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      <marc:subfield code="a">Environmental problems of Lake Victoria in relation to human activities </marc:subfield>
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      <marc:subfield code="b">lessons from another great lake / </marc:subfield>
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      <marc:subfield code="a">"Presented as keynote address at: Towards Sustainable Development and Management of the Lake Victoria Basin: A Regional Workshop Sponsord by the European Union and the International Development Research Centre, 21 April 1997, Jinja, Uganda".</marc:subfield>
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