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Maciej Siuda
Apiculture Division, Faculty of Animal Bioengineering, Warmia and Mazury University, Sloneczna 48, 10-710 Olsztyn, Poland
Jerzy Wilde
Apiculture Division, Faculty of Animal Bioengineering, Warmia and Mazury University, Sloneczna 48, 10-710 Olsztyn, Poland
Jerzy Woyke
Division of Apiculture, University of Life Science, 166 Nowoursynowska, 02-787 Warsaw
Zygmunt Jasiński
Division of Apiculture, University of Life Science, 166 Nowoursynowska, 02-787 Warsaw
Beata Madras-Majewska
Division of Apiculture, University of Life Science, 166 Nowoursynowska, 02-787 Warsaw