DOŁĘGA, J. M. Environmental Sciences at the Beginning of the 21st Century. Paedagogia Christiana, [S. l.], v. 28, n. 2, p. 11–39, 2011. DOI: 10.12775/PCh.2011.001. Disponível em: https://apcz.umk.pl/PCh/article/view/PCh.2011.001. Acesso em: 19 apr. 2024.