MICHEELSEN, Harry. Rumalderens råstoffer. Varv, [S. l.], v. 1969, n. 1, p. 15–22, 1969. DOI: 10.7146/varv.v1969i1.151257. Disponível em: https://tidsskrift.dk/varv/article/view/151257. Acesso em: 6 dec. 2025.