Matthiesen, Henning; Gregory, David; Jensen, Poul; Sørensen, Birgit (2004). "Environmental Monitoring at Nydam, a Waterlogged Site with Weapon Sacrifices from the Danish Iron Age. I: A Comparison of Methods Used and Results from Undisturbed Conditions". Journal of Wetland Archaeology. 4 (1): 57. doi:10.1179/jwa.2004.4.1.55. S2CID176947056.
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Matthiesen, Henning; Gregory, David; Jensen, Poul; Sørensen, Birgit (2004). "Environmental Monitoring at Nydam, a Waterlogged Site with Weapon Sacrifices from the Danish Iron Age. I: A Comparison of Methods Used and Results from Undisturbed Conditions". Journal of Wetland Archaeology. 4 (1): 57. doi:10.1179/jwa.2004.4.1.55. S2CID176947056.