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by Riddell, D.C. (David Campbell);
Freestone, H.J. (Horace John);
-- Southland (N.Z.)Regional Council. Waiau Working Party.;
Works Consultancy Services Ltd
by Livingston, M. E. (Mary Elizabeth);
Biggs, B. J. F. Barry John Franklyn;
Gifford, J. S. (John S.).
-- New ZealandWater and Soil Directorate.;
New ZealandMinistry of Works and Development.;
New ZealandNational Water and Soil Conservation Authority.