Creer, K., Hogg, T., Readman, P., & Reynaud, C. (1980). Palaeomagnetic secular variation curves extending back to 13,400 years B.P. recorded by sediments deposited in Lac de Joux, Switzerland. Journal of Geophysics, 48(1), 139-147. Retrieved from https://journal.geophysicsjournal.com/JofG/article/view/247