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181   $2rdacontent
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200 10$aPlan B 4.0 movilizarse para salvar la civilizacion /$fLester R. Brown
210  1$a[Place of publication not identified] :$cCentro de Estudios para el Desarrollo Sostenible,$d2010.
210  4$dİ2010
215   $a1 online resource (276 p.)
300   $aDescription based upon print version of record.
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606   $aEnvironmental policy$xEconomic aspects
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