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

Kolk A & Sierpiński A
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Kolk, A., & Sierpiński, A. (1999). The infestation of Polish forests by insect pests in 1998 and the forecast for 1999. In B. Forster, M. Knížek, & W. Grodzki (Eds.), Methodology of forest insect and disease survey in Central Europe. Proceedings of the second workshop of the IUFRO working party 7.03.10. April 20-23, 1999, Sion-Châteauneuf, Switzerland (pp. 89-93). Swiss Federal Institute for Forest, Snow and Landscape Research.