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  • Preliminary results from microanalyses of organic matter in the lower Proterozoic uranium ores at Oklo in Gabon [microform] / by Joel S. Leventhal, Bartholomew Nagy, and F. Gauthier-Lafaye.

    • Text
    • [Denver, CO] : U.S. Dept. of the Interior, Geological Survey : [Books and Open-File Reports Section], 1989.
    • 1989

  • Modern mobile methane measurements in marshes [microform] / by Joel S. Leventhal.

    • Text
    • [Denver, CO] : U.S. Dept. of the Interior, U.S. Geological Survey : [Books and Open-File Reports Section, distributor], 1992.
    • 1992

  • Soil organic carbon content in rice soils of Arkansas and Louisiana and a comparison to non-agricultural soils, including a bibliography for agricultural soil carbon [microform] / by Joel Leventhal and Larry Ward.

    • Text
    • [Denver, CO] : U.S. Geological Survey, [1997]
    • 1997

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