Franz, J. M. 1970. Schadensschwellen bei forst schadlichen Insekten [Threshold values in relation to insect pests of forests] . Zeitschrift fur Pflanzenkrankeiten (Pflanzenpathologie) und Pflanzenschutz 77:642-647.
Franz 1970
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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