Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Fransen, J. J. 1951. De ontivikkeling van de insectenbestrijding in de bosbouw [The development of insect control in forestry] . Nederlandsche Heidemaatschappij Tijdschrift 6229-35, 81-86, 130-134, 179-183.
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