00453nam a2200169Ia 4500008004100000020001500041082001700056100002400073245003100097250000600128260004000134300000800174650001400182650002000196653003800216653002900254170901s1976    xx            000 0 und d  a0471196029  a333.72bD18E  aDasmann, Raymond F. 0aEnvironmental Conservation  a4  aNew YorkbJohn Wiley and Sonsc1976  a436  aEconomics  aSocial sciences  aConservation of natural resources  aEnvironmental protection