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2“…Washington: Worldwatch Institute…”
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4“…Washington D.C.: Worldwatch Institute; London: Earthscan Publications…”
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5by Brown, Lester R., Flavin, Christopher, Postel, Sandra, Starke, Linda, Huys, Kathleen, Filapek, Rudi“…Washington D.C.: Worldwatch Institute; Berlaar: Pauli Publishing…”
Published 1993
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