ZIRKER, Hans. Vorwort. Religionspädagogische Beiträge, [S. l.], v. 17, p. 1, 1986. DOI: 10.20377/rpb-511. Disponível em: https://rpb-journal.de/index.php/rpb/article/view/511. Acesso em: 29 juli. 2026.