Puc , M. (2014) “Pollen of hazel, alder and birch in the air of Szczecin in the years 2012–2014”, Alergoprofil, 10(2), pp. 32-37. Available at: https://www.journalsmededu.pl/index.php/alergoprofil/article/view/798 (Accessed: 3October2025).