CZUBLA, P.; STRZYŻ, P. Rock materials in the manufacture of cannonballs in Poland – selected examples. Fasciculi Archaeologiae Historicae, [S. l.], v. 26, p. 99–109, 2013. Disponível em: https://journals.iaepan.pl/fah/article/view/1466. Acesso em: 29 apr. 2024.