Ngā hua rapu - "agricultural ecology Papua New Guinea."
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Regional action learning programme development of conservation farming systems : report of the inaugural workshop, Chiang Mai, Thailand, 23 February-1 March, 1990 /
I whakaputaina 1990Ngā marau:Conference Proceeding Pukapuka -
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Land for tomorrow : subsistence agriculture, soil fertility and ecosystem stability in the New Guinea highlands /
I whakaputaina 1984Ngā marau:Thesis Pukapuka -
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Regional action planning programme on the conservation farming system : report of the review workshop, Lumut, Perak, Malaysia, 26-30 August 1991 /
I whakaputaina 1991Ngā marau:Pukapuka