books.google.co.uk - Since its founding in 1916, the National Park Service has been charged with two equally important and often conflicting missions: to preserve our country's natural wonders for future generations and to develop national parks for the appreciation and enjoyment of visitors. Recalling the era of the great...http://books.google.co.uk/books/about/Building_the_national_parks.html?id=mJPkUjdBCUkC&utm_source=gb-gplus-shareBuilding the national parks
