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Subjects
Effect of human beings on, Frontier and pioneer life, Frontier and pioneer life, colorado, History, Indians of North America, Indians of north america, history, National parks and reserves, united states, Nature, Nature, effect of human beings on, Strikes and lockouts, coal mining, TourismID Numbers
- OLID: OL3269826A
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April 30, 2008 | Created by an anonymous user | initial import |