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Timburas, R. D.; Pinaria, A. G.; Lengkong , E. F. The Effect Of Several Concentrations Of Growth Regulatory Substance (ZPT) Auxin NAA (Naphthalene Acetic Acid) On The Root Growth Of Vanila (Vanila Planifolia Andrew) Cuttings. JAT 2023, 4, 67-73.