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 Date: 2012-02-01 17:24:33Geography of the United States Geography of Arkansas Mississippi River watershed Sonoran Desert Wild and Scenic Rivers of the United States American Heritage Rivers Mormon Trail Colorado River Missouri River Snake River Mississippi River Gila River |
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U. S. Department of the Interior U. S. Geological Survey Stable Hydrogen and Oxygen Isotope Ratios for Selected Sites of the U.S. Geological Survey’s NASQAN and
