Authors
Tomasz Grenda
Department of Hygiene of Animal Feedingstuffs, National Veterinary Research Institute, Pulawy, Poland
Magdalena Grabczak
Department of Hygiene of Animal Feedingstuffs, National Veterinary Research Institute, Pulawy, Poland
Magdalena Goldsztejn
Department of Hygiene of Animal Feedingstuffs, National Veterinary Research Institute, Pulawy, Poland
Nina Kozieł
Department of Hygiene of Animal Feedingstuffs, National Veterinary Research Institute, Pulawy, Poland
Krzysztof Kwiatek
Department of Hygiene of Animal Feedingstuffs, National Veterinary Research Institute, Pulawy, Poland
Krystyna Pohorecka
Department of Honey Bee Diseases, National Veterinary Research Institute, Pulawy, Poland
Marta Skubida
Department of Honey Bee Diseases, National Veterinary Research Institute, Pulawy, Poland
Andrzej Bober
Department of Honey Bee Diseases, National Veterinary Research Institute, Pulawy, Poland