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  1. 1

    Cation binding by humic substances Tipping, Edward, 1948-

    I whakaputaina 2002
    An electronic book accessible through the World Wide Web; click to view
    Tāhiko īPukapuka
  2. 2

    Humic acids from raw materials of the Czech Republic

    I whakaputaina 2011
    An electronic book accessible through the World Wide Web; click to view
    Tāhiko īPukapuka