Timmen, Ludger: Absolute gravity measurements at the iGrav047 site on Helgoland (GFZ Potsdam, AWI facility) with the Hannover gravity meter FG5X-220 in June 2021. Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2021-07-19, 2 S. DOI:
https://doi.org/10.15488/13078