Duma G, Leichter B, MagNetE Group the. Magnetic Declination Chart 2006 of Europe – produced by the MagNetE Group. Ann. Geophys. [Internet]. 2013Mar.7 [cited 2024Apr.23];55(6). Available from: https://www.annalsofgeophysics.eu/index.php/annals/article/view/5575