“Number of Days With Thunderstorm in the Area of Bydgoszcz in the Years 1971-2010 Using the Example of the Bydgoszcz-Airport Weather Station”. Geography and Tourism 2, no. 9 (December 1, 2021): 67–74. Accessed November 24, 2024. https://czasopisma.ukw.edu.pl/index.php/gat/article/view/162.