00826nam0-22003011i-450-99000372745040332120051129103145.0000372745FED01000372745(Aleph)000372745FED0100037274520030910d1956----km-y0itay50------baengUSa-------001yyConserving american resourcesRuben L. ParsonEnglewood Cliffs, N.J.Prentice-hall1956540 p.ill.24 cmParson,Ruben L.289900ITUNINARICAUNIMARCBK990003727450403321Q2-Q4.391523DECTSK-02-066Ist. 5604ILFGEDECTSILFGEConserving american resources501236UNINA