Rapiejko , P., Lipiec , A., Puc , M., Świebocka , E., Sankowski , Z., Siergiejko , G. and Jurkiewicz , D. 2017. The analysis of grass pollen season in northern Poland in 2017. Alergoprofil. 13, 4 (Dec. 2017), 154-156. DOI:https://doi.org/10.24292/01.AP.151217.