SØRENSEN, P. H. The Use of Air Photographs in Celtic Field Studies. Journal of Danish Archaeology, [S. l.], v. 1, p. 77–86, 1982. DOI: 10.1080/0108464X.1982.10589877. Disponível em: https://tidsskrift.dk/jda/article/view/125738. Acesso em: 2 jul. 2024.