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by Currie, K.J. (Manawatu Catchment Board and Regional Water Board); Gilliland, B.W. (Manawatu Catchment Board and Regional Water Board).
by McBride, G.B. (Ministry of Works and Development, Water and Soil Division, District Office. Hamilton); Rutherford, J.C. (Ministry of Works and Development, Water and Soil Division, District Office. Hamilton).
by Smith, D. G; Macaskill, J. B; Stevenson, C. D; Edgerley, W. H. L. -- New Zealand Water and Soil Division; National Water and Soil Conservation Organisation (N.Z.)
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