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  1. 1
    Published 1975
    Subjects “...Water resources development New Zealand....”
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    Regional planning and development by water and soil conservation agencies /
  2. 2
    Published 1975
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    Forest operations to safeguard water and soil resources : proceedings of: Water and Soil Division course no.2, held at Rotorua, 28 April-2 May 1975.

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