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Alicja Sierpińska
Forest Research Institute, Department of Forest Protection, Sękocin Stary, Braci Leśnej 3, 05-090 Raszyn, Poland, phone: 48 22 7150 547, fax: 48 22 7150 557
Elżbieta Popowska-Nowak
Cardinal Stefan Wyszynski University in Warsaw, Faculty of Biology and Environmental Sciences, Wójcickiego 1/3, 01-938 Warsaw, Poland
Andrzej Bednarek
Rol-Eko Sp. z o.o., Pietraszewicza „LOTA” 9/2a, 02-790 Warsaw, Poland