004120000a2200121000450024500960000065000210009665000320011765000360014965100190018504100130020410000230021777300500024010aAd hoc reservations: foward or backward steps in developing representative reserve systems?14aAreas protegidas14aPlanificación de reservas14aConservación de biodiversidad 4pEstados Unidos0 aInglés1 aPressey, Robert L.1 tConservation Biology324h3q662-668d1994g8