SANDNER, Jan. Selected Aspects of Environmental Processes in Holistic Nature Related Education in the Light of Sustainable Development Concepts. Problemy Ekorozwoju, [S. l.], v. 3, n. 2, p. 69–80, 2008. Disponível em: https://ph.pollub.pl/index.php/preko/article/view/4663. Acesso em: 22 nov. 2024.