003970000a2200133000450024500730000065000210007365000200009465000120011465000380012665100190016404100130018310000210019677300460021710aWild animal life as a product and as a necessity of national forests14aAreas protegidas14aFauna silvestre14aBosques14aFilosofía de parques nacionales 4pEstados Unidos0 aInglés1 aGrinnell, Joseph1 tJournal of Forestryh8q837-845d1924g22