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  1. 1
    Gully development and control : the status of our knowledge /
    by Heede, Burchard H.
    Published 1976
    Government Document Book
  2. 2
    Dolores River archeology : canyon adaptations as seen through survey /
    by Toll, Henry Wolcott
    Published 1977
    Government Document Book
  3. 3
    Black Canyon National Conservation Act of 1991 : hearing before the Subcommittee on National Parks and Public Lands of the Committee on Interior and Insular Affairs, House of Representatives, One Hundred Second Congress, second session, on H.R. 1321 ... hearing held in Washington, DC, March 31, 1992.
    Published 1993
    Connect to the full text of this electronic book
    Government Document eBook
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