Showing 1 - 2 results of 2 for search 'Valdez, Richard A.', query time: 0.02s Refine Results
  1. 1
    Life history and ecology of the humpback chub (Gila cypha) in the Colorado River, Grand Canyon, Arizona : final report /

    Life history and ecology of the humpback chub (Gila cypha) in the Colorado River, Grand Canyon, Arizona : final report / by Valdez, Richard A.

    Published 1995
    Government Document Book
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  2. 2
    Observations of environmental change in Grand Canyon, Arizona /

    Observations of environmental change in Grand Canyon, Arizona / by Webb, Robert H.

    Published 2002
    Other Authors:
    Online Access
    Online Access
    Government Document eBook
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