00483nam a2200169Ia 4500008004100000020001500041082002100056100002000077245005800097250000600155260004900161300000800210650001400218650002000232653003800252653002300290170901s1985    xx            000 0 und d  a0023901004  a333.720973bO92N  aOwen, Oliver S. 0aNatural Resource ConservationbAn Ecological Approach  a4  aNew YorkbMacmillan Publishing Companyc1985  a657  aEconomics  aSocial sciences  aConservation of natural resources  aEcological aspects