Showing 1 - 20 results of 48 for search 'Webb, Robert H.', query time: 0.14s Refine Results
  1. 1
    Preliminary assessment of water quality in the alluvial aquifer of the Puerco River basin, Northeastern Arizona /
    by Webb, Robert H.
    Published 1987
    Government Document Book
  2. 2
    Debris flows from tributaries of the Colorado River, Grand Canyon National Park, Arizona /
    by Webb, Robert H.
    Published 1987
    Government Document Microform Book
  3. 3
    The response of vegetation to disturbance in Death Valley National Monument, California /
    by Webb, Robert H.
    Published 1988
    Government Document Book
  4. 4
    Debris flows from tributaries of the Colorado River, Grand Canyon National Park, Arizona : executive summary /
    by Webb, Robert H.
    Published 1987
    Government Document Microform Book
  5. 5
    Distribution of radionuclide and trace-elements in ground water, grasses, and surficial sediments associated with the alluvial aquifer along the Puerco River, northeastern Arizona : a reconnaissance sampling program /
    by Webb, Robert H.
    Published 1987
    Government Document Microform Book
  6. 6
    Debris flows from tributaries of the Colorado River, Grand Canyon National Park, Arizona /
    by Webb, Robert H.
    Published 1989
    Government Document Book
  7. 7
    Climatic variability and flood frequency of the Santa Cruz River, Pima County, Arizona /
    by Webb, Robert H.
    Published 1992
    Government Document Book
  8. 8
    Climatic variability and flood frequency of the Santa Cruz River, Pima County, Arizona /
    by Webb, Robert H.
    Published 1990
    Government Document Microform Book
  9. 9
    Grand Canyon : a century of change : rephotography of the 1889-1890 Stanton Expedition /
    by Webb, Robert H.
    Published 1996
    Book
  10. 10
    Observations of environmental change in Grand Canyon, Arizona /
    by Webb, Robert H.
    Published 2002
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    Government Document eBook
  11. 11
    The ribbon of green : change in riparian vegetation in the southwestern United States /
    by Webb, Robert H.
    Published 2007
    Table of contents only
    Book
  12. 12
    Frequency of debris flows in Grand Canyon /
    by Webb, Robert H.
    Published 2003
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    Government Document Book
  13. 13
    Sediment delivery by ungaged tributaries of the Colorado River in Grand Canyon /
    by Webb, Robert H.
    Published 2001
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    Get full text
    Government Document eBook
  14. 14
    Monitoring of coarse sediment inputs to the Colorado River in Grand Canyon /
    by Webb, Robert H.
    Published 2001
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    Get full text
    Government Document eBook
  15. 15
    Environmental Effects of Off-Road Vehicles : Impacts and Management in Arid Regions /
    by Webb, Robert H.
    Published 1983
    Connect to the full text of this electronic book
    eBook
  16. 16
    Soil compaction vulnerability at Organ Pipe Cactus National Monument, Southwestern Arizona /
    by Webb, Robert H.
    Published 2014
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    Get full text
    Government Document eBook
  17. 17
    Lava Falls Rapid in Grand Canyon : effects of late Holocene debris flows on the Colorado River /
    by Webb, Robert H.
    Published 1999
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    Government Document eBook
  18. 18
    Reworking of aggraded debris fans by the 1996 controlled flood on the Colorado River in Grand Canyon National Park, Arizona /
    by Webb, Robert H.
    Published 1997
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    Government Document eBook
  19. 19
    "The great cataract" : effects of late holocene debris flows on Lava Falls Rapid, Grand Canyon National Park, Arizona /
    by Webb, Robert H.
    Published 1996
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    Government Document eBook
  20. 20
    Elementary wave optics /
    by Webb, Robert H., 1934-
    Published 1969
    Book
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