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  1. 1
    Geo botanical reconnaissance near Grants, New Mexico /
    by Cannon, Helen L., 1911-1996
    Published 1953
    Subjects: “...Geobotanical prospecting New Mexico Grants....”
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    Government Document eBook
  2. 2
    Description of indicator plants and methods of botanical prospecting for uranium deposits on the Colorado Plateau /
    by Cannon, Helen L., 1911-1996
    Published 1957
    Subjects: “...Biogeochemical prospecting Colorado Plateau....”
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    Government Document eBook
  3. 3
    Metal absorption by Equistetum (Horsetail) : a study of the metal content of horsetail plants as related to the amounts of metals in the soil on which they grew /
    Subjects: “...Geochemical prospecting United States....”
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    Government Document eBook
  4. 4
    Botanical prospecting for uranium on La Ventana Mesa, Sandoval County, New Mexico /
    Subjects: “...Geobotanical prospecting. http://id.loc.gov/authorities/subjects/sh85053956...”
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    Government Document eBook
  5. 5
    Geochemical relations of zinc-bearing peat to the Lockport dolomite, Orleans County, New York /
    by Cannon, Helen L., 1911-1996
    Published 1955
    Subjects: “...Geochemical prospecting. http://id.loc.gov/authorities/subjects/sh85053959...”
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    Government Document eBook
  6. 6
    The development of botanical methods of prospecting for uranium on the Colorado Plateau /
    by Cannon, Helen L., 1911-1996
    Published 1960
    Subjects: “...Biogeochemical prospecting. http://id.loc.gov/authorities/subjects/sh85014145...”
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    Government Document
  7. 7
    Geochemistry of rocks and related soils and vegetation in the Yellow Cat area, Grand County, Utah /
    by Cannon, Helen L., 1911-1996
    Published 1964
    Subjects: “...Geochemical prospecting Utah Grand County....”
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    Government Document
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