00725cam a22002417a 4500003000500000005001700005008004100022010000900063011000900072035000900081040000900090100002400099245008300123260007800206300001800284490003000302650002500332650002900357650002500386650002100411700002100432830003000453CHAP20220329133128.0971013s1990            r     00010     d  a2474  a3446  a2646  cCHAP00aMcDonald, Philip M. 0aPonderosa pine seedlings and competing vegetationb: ecology, growth, and cost  aBerkeley, Ca :bForest Service. Pacific Southwest Research Station,c1990  a10 p.b: ilus 0aResearch paperv; PSW-19914aEcología forestal.14aPináceasxCrecimiento.14aPináceasxSemilla.14aPinus ponderosa.0 aFiddler, Gary O.0 aResearch paperv; PSW-199