Showing 1 - 1 results of 1 for search 'U.S. Dept. of the Interior, U.S. Geological Survey ;', query time: 0.34s Refine Results
  1. 1
    The Colorado River in Grand Canyon : how fast does it flow?
    by Graf, Julia B.
    Published 1997
    “...Grand Canyon Monitoring and Research Program, U.S. Dept. of the Interior, U.S. Geological Survey,...”
    Government Document Book
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