BACHMANN, Willi; NAVILLE, Gustave. Dank an den Fan-Club der Chemielehrerschaft. CHIMIA, [S. l.], v. 49, n. 9, p. 349, 1995. Disponível em: https://www.chimia.ch/chimia/article/view/1995_349.. Acesso em: 17 aug. 2024.