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Barbara Głowacka
Forest Research Institute, Department of Forest Protection, Sękocin Stary, Braci Leśnej 3, 05-090 Raszyn, Poland, phone: 48 22 7150540, fax: 22 7150567
Cezary Bystrowski
Forest Research Institute, Department of Forest Protection, Sękocin Stary, Braci Leśnej 3, 05-090 Raszyn, Poland, phone: 48 22 7150540, fax: 22 7150567