The infestation of Polish forests by insect pests in 1998 and the forecast for 1999

Kolk A & Sierpinski A
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Kolk, A., & Sierpinski, A. (1999). The infestation of Polish forests by insect pests in 1998 and the forecast for 1999. In B. Forster, M. Knizek, & W. Grodzki (Eds.), Methodology of Forest Insect and Disease Survey in Central Europe. Proceedings (pp. 89-93). Swiss Federal Institute for Forest, Snow and Landscape Research.