ROTH, Flemming. Gram Slot - et nyt egnsgeologisk museum. Varv, [S. l.], v. 1979, n. 2, p. 53–54, 1979. DOI: 10.7146/varv.v1979i2.148868. Disponível em: https://tidsskrift.dk/varv/article/view/148868. Acesso em: 6 dec. 2025.