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Ewa Waś
Research Institute of Horticulture, Apiculture Division, Kazimierska 2, 24-100 Puławy, Poland
Teresa Szczęsna
Research Institute of Horticulture, Apiculture Division, Kazimierska 2, 24-100 Puławy, Poland
Helena Rybak-Chmielewska
Research Institute of Horticulture, Apiculture Division, Kazimierska 2, 24-100 Puławy, Poland