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Patterson, Tom
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Location
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United States
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2012
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1. U.S. Parks and Protected Land Points, 1:10 million (2012)
2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This point shapefile depicts the locations of 394 authorized Park Service units in the United States only that are over 100,000 acres. The data doe... North American Cartographic Information Society.