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  1. 1
    by Muthappa, B. N.
    Published 1986
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    Interim report on the outbreak of coffee rust in the highlands of Papua New Guinea /
  2. 2
    by Silva, N. T. M. H. de
    Published 1987
    Book
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    Weed control strategies for coffee in Papua New Guinea : smallholders, shade, socio-economic and other factors /

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