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101 0 $aeng
102   $aUS
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200 1 $aDiffusion and ecological problems$eModern perspectives$fA. Okubo, S. A. Levin
210   $aNew York$cSpringer$dc2001
215   $d24 cm
610 0 $aBiologia$aModelli matematici
610 0 $aEcologia$aModelli matematici
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701  1$aLevin,$bSimon A.$042723
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