00839nam a2200205 a 450000500170000000800410001704000270005804100080008504400080009308200140010111000480011524502250016326000780038830000330046665000330049965000250053265000260055765000290058365000210061220191224041539.0160212s1968    wau    fr|||| 000 0 spa d  aCO-BoIAVH cCO-BoIAVH 0 aeng  axxu04a354bD41a2 bDepartament of the InterioraUnited States.10aCompilation of the administrative policies for the national recreation areas, national seashores, national lakeshores, national parkways, national scenic riverways (recreational area category) of the national park system  aWashington :bDepartment of the Interior :bNational Park Service,c1968.  a108 páginas ;c24 x 15 cm.26aParques nacionales naturales16aPolítica ambiental26aAreas de recreación26aRecursos paisajísticos26aManejo ambiental