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Growth of a New Science
From Homesteads to Valley Authorities
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American Appalachian Appalachian Trail Appalachian valleys backflow balance Barbarian Benton MacKaye building called centers civilization Civilizee colony commerce clause Congress conservation continent cycle of waters downstream earth more habitable ecology economic engineer England federal fee simple flood control flood plain flowage folk-flow folkland forest cover Forest Service Forestry Geddes geography geotechnics geotechnist Hudson human indigenous industry Jefferson Kapuskasing Lewis Mumford lines living MacKaye MacKaye's man's metropolis metropolitan invasion motor slum mountain movement National Forests natural resources nature's navigation Northwest Ogden Oswald Spengler outdoor culture Patrick Geddes physical Pinchot planner population President primeval environment problem public land regional planning Roosevelt rural settlers social soil sovereignty stream Survey Tennessee River Tennessee Valley thing tion town townless highway Trail tributaries U. S. Constitution United upstream urban Utopia Valley Authority visualize Wapack Trail Washington watershed wilderness areas word