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  1. 1
    The principales of biological control : interrelation of hosts and pests and utilization in regulation of animal and plant populations

    The principales of biological control : interrelation of hosts and pests and utilization in regulation of animal and plant populations per Sweetman,Harvey L.

    Publicat 1958
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  2. 2
    The biological control of insects: with a chapter on weed control

    The biological control of insects: with a chapter on weed control per Sweetman, Harvey L.

    Publicat 1936
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