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1Izdano 1998“…Worldwatch Institute…”
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2“…Worldwatch Institute…”
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3“…Worldwatch Institute…”
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4Izdano 2000“…Worldwatch Institute…”
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5
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6Izdano 1993“…Worldwatch Institute…”
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7Izdano 2005“…worldwatch institute…”
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8
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9Izdano 1991“…Worldwatch Institute…”"Special 20th anniversary edition"--Dust jacket.
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10
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11Izdano 1999“…Worldwatch Institute…”
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12Izdano 1996“…Worldwatch Institute…”
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13Izdano 1988“…Worldwatch Institute…”
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14Izdano 1984“…Worldwatch Institute…”
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15