00466nam a2200169Ia 4500008004100000020001500041082001700056100002100073245005100094260005100145300000900196650002000205650001400225653001500239700002100254700002100275170901s1977    xx            000 0 und d  a0716700298  a301.32bE42E  aEhrlich, Paul R. 0aEcosciencebPopulation, Resources, Environment  aSan FranciscobW. H. Freeman and Companyc1977  a1051  aSocial sciences  aSociology  aPopulation  aEhrlich, Anne H.  aHoldren, John P.