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  • Potential cause for low lead and chromium recoveries during acid extractions [microform] / Alan D. Hewitt and James H. Cragin.

    • Text
    • Hanover, N.H. : U.S. Army Corps of Engineers, Cold Regions Research & Engineering Laboratory ; [Springfield, Va. : Available from NTIS, 1992]
    • 1992

  • Feasibility study of preparing performance evaluation soils for analyzing volatile organic compounds [microform] / Alan D. Hewitt.

    • Text
    • [Hanover, N.H.] : US Army Corps of Engineers, Cold Regions Research & Engineering Laboratory ; [Springfield, Va. : Available from NTIS, 1993]
    • 1993

  • Vapor-fortified QA/QC samples for the analysis of volatile organic compounds [microform] / Alan D. Hewitt.

    • Text
    • [Hanover, N.H.] : US Army Corps of Engineers, Cold Regions Research & Engineering Laboratory ; [Springfield, Va : Available from NTIS, 1994]
    • 1994

  • Concentration stability of four volatile organic compounds in soil subsamples [microform] / Alan D. Hewitt.

    • Text
    • [Hanover, N.H.] : US Army Corps of Engineers, Cold Regions Research & Engineering Laboratory ; [Springfield, Va. : Available from NTIS, 1994]
    • 1994

  • Losses of trichloroethylene from soil during sample collection, storage and laboratory handling [microform] / Alan D. Hewitt.

    • Text
    • [Hanover, N.H.] : US Army Corps of Engineers, Cold Regions Research & Engineering Laboratory ; [Springfield, Va. : Available from NTIS, 1994]
    • 1994

  • Screening for metals by x-ray fluorescence spectrometry using a single calibration standard [microform] / Alan D. Hewitt.

    • Text
    • [Hanover, N.H.] : U.S. Army Corps of Engineers, Cold Regions Research & Engineering Laboratory ; [Springfield, Va. : Available from NTIS, 1994]
    • 1994

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