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  1. 1
    Plant growth substances 1982 : proceedings of the 11th International Conference on Plant Growth Substances, held in Aberystwyth from 12th to 16th July, 1982
    “…International Plant Growth Substances Association. Conference. (11o…”
    Libro
  2. 2
    Plant growth substances 1985 : proceedings of the 12th International Conference on Plant Growth Substances, held at Heilderberg, August 26-31, 1985
    “…International Plant Growth Substances Association. Conference. (12o…”
    Libro

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