00844nam0-22003011i-450-99000750432040332120051129142510.0000750432FED01000750432(Aleph)000750432FED0100075043220030814d1958----km-y0itay50------bafreFRabc-----001yyConservation of natural resourceseditor Guy Harold Smithcontributors O.D. Diller, ... [e altri]2. ed.New YorkWiley1958XI, 474 p.ill.24 cmRisorseSmith,Guy-HaroldITUNINARICAUNIMARCBK990007504320403321C-06-086Ist.6547ILFGEILFGEConservation of natural resources676667UNINA