00778nam0 22002651i 450 99000727856040332120200609120509.000072785620021010d1991----km-y0itay50------baengNatural resource economicsnotes and problemJon M. Conrad, Colin W. ClarkCambridgeCambridge University Press1991229 p.28 cmRisorse naturali - Economia333.7Conrad,J.M.415111Clark,Colin Whitcomb49531ITUNINARICAUNIMARCBK990007278560403321XV H1 22314263XV H1 223DTEDTENatural resource economics1745010UNINAGEN01