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    Author
    Johansen, C. A. (Carl A.) (2)
    Retan, Arthur H. (2)
    Eves, J. D. (Jack D.) (1)SubjectBeneficial insects--Washington (State) (1)Field crops--iseases and pests. (1)Insect pests--Biological control. (1)... View MoreDate Issued
    1972 (2)

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    Insect answers: trapping alfalfa leafcutter bees for fun and profit 

    Johansen, C. A. (Carl A.); Retan, Arthur H. (Pullman, Washington : Washington State University. Extension., 1972-01)
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    Beneficial predators and parasites found on Washington crops 

    Johansen, C. A. (Carl A.); Eves, J. D. (Jack D.); Retan, Arthur H. (Pullman, Washington : Washington State University. Extension., 1972-07)