Polish Bishops’ Conference. “Pastoral Letter of Polish Bishops on Environmental Protection (May 2, 1989)”. Studia Ecologiae et Bioethicae 18, no. 1 (March 31, 2020): 107–110. Accessed May 6, 2024. https://czasopisma.uksw.edu.pl/index.php/seb/article/view/6344.