00789nam0 2200241 450 00002283120090211115156.0080181951220090211d1977----km-y0itay50------baengUSy-------001yyConservation and economic efficiencyan approach to materials policyTalbot PageBaltimoreJohns Hopkins University Press1977XVIII, 264 p.24 cmConservation and economic efficiency45903Risorse naturaliEconomiaPage,Talbot070535218ITUNIPARTHENOPE20090210RICAUNIMARC000022831323/115502NAVA22009Conservation and economic efficiency45903UNIPARTHENOPE