LIBROS DEL AUTOR: dr gil lusk

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  • National Parks Our Living National Treasures
    Dr. Gil Lusk / DrGil Lusk
    The National Park Service, created in 1916 and now over one hundred years old, has become an immensely popular concept with visitation equal to the national population of the United States every year. Along the way, the Service has picked up a few issues and stresses that endanger the mission of the NPS. Its unique mission is to preserve and protect America's significant na...
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