ENDZINAS, A. Issues of public education in East Prussia. Psichologija, [S. l.], v. 9, n. 1, p. 85–98, 1968. DOI: 10.15388/Psichol.1968.9.8921. Disponível em: https://journals.vu.lt./psichologija/article/view/8921. Acesso em: 28 apr. 2025.