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1.
Lake Hayes : eutrophication and options for management - internal treatment evaluation and preliminary design

by Robertson, B. M. (Barry M.). -- Otago Catchment Board and Regional Water Board; Royds Garden Ltd. (N.Z.)

Publisher: Dunedin, N.Z. : Otago Catchment Board and Regional Water Board, [1989]Holdings: GRETA POINT: 556.555.6(931.3) LAKAvailability: Items available for loan: WELLINGTON [556.555.6(931.3) LAK] (1).
2.
Lake Hayes eutrophication and options for management : technical report

by Robertson, B. M. (Barry M.). -- Otago Catchment Board and Regional Water Board

Publisher: Dunedin, N.Z. : Otago Catchment Board and Regional Water Board, [1988]Holdings: GRETA POINT: 556.555.6(931.3) LAKAvailability: Items available for loan: WELLINGTON [556.555.6(931.3) LAK] (1).
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