00817nam0-22003011i-450-9900031404004033210-521-31174-8000314040FED01000314040(Aleph)000314040FED0100031404020000920d1990----km-y0itay50------baitaITNatural Resource EconomicsConservation and ExploitationPhilip A. Neher.CambridgeCambridge University Press1990.IX, 360 p.22 cmH/0.1H/0.2Neher,Philip A.ITUNINARICAUNIMARCBK990003140400403321H/0.1 NEH/N.A.9186SESSESNatural Resource Economics455544UNINAING01