00387nam a2200145Ia 4500008004100000020001500041082001700056100002400073245003800097260003900135300000800174650001400182650002000196653002500216170901s1993    xx            000 0 und d  a0878937226  a333.95bP81E  aPrimack, Richard B. 0aEssentials of Consevation Biology  aUSAbSinauer Associates Inc.c1993  a564  aEconomics  aSocial sciences  aConservation biology