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  1. 1

    Humic substances, their structure and function in the biosphere proceedings of an international meeting held at Nieuwersluis, the Netherlands, May 29-31, 1972

    Publicat 1975
    Llibre

    Humic substances, their structure and function in the biosphere proceedings of an international meeting held at Nieuwersluis, the Netherlands, May 29-31, 1972
  2. 2

    Project aqua a source book of inland waters proposed for conservation per Luther, H.

    Publicat 1971
    Llibre

    Project aqua a source book of inland waters proposed for conservation
  3. 3

    The biological basis of freshwater fish production a symposium

    Publicat 1967
    Llibre

    The biological basis of freshwater fish production a symposium
  4. 4

    Primary productivity in aquatic environments proceedings of an I.B.P. PF symposium, Pallanza, Italy, April 26-May 1, 1965

    Publicat 1966
    Llibre

    Primary productivity in aquatic environments proceedings of an I.B.P. PF symposium, Pallanza, Italy, April 26-May 1, 1965

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