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100   $a20030910d1972----km-y0itay50------ba
101 0 $aeng
102   $aUS
200 1 $aPopulation, resources, environment$eissues in human ecology$fPaul Ehrlich, Anne H. Ehrlich
205   $a2nd ed.
210   $aSan Francisco$cW.H. Freeman$d1972
215   $aXIV, 509 p.$d26 cm
225 1 $a<<A >>series of books in biology
610 0 $aDemografia, Movimento naturale
610 0 $aEcologia
700  1$aEhrlich,$bPaul R.$063723
701  1$aEhrlich,$bAnne H.$063724
801  0$aIT$bUNINA$gRICA$2UNIMARC
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996   $aPopulation, resources, environment$9438627
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