Olofsson, E.
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Evaluation of a nuclear polyhedrosis virus as an agent for the control of the balsam fir sawfly, neodiprion abietis harr. I-P-X-2.
Evaluation of a nuclear polyhedrosis virus as an agent for the control of the balsam fir sawfly, neodiprion abietis harr. I-P-X-2.