_:vb2054302 _:vb2054303 . _:vb2054302 "Bundesanstalt f\u00FCr Geowissenschaften und Rohstoffe (BGR)"@de . _:vb2054302 . _:vb2054303 "Hannover" . _:vb2054303 "DE" . _:vb2054302 . _:vb2054303 . _:vb2054303 "Stilleweg 2" . _:vb2054302 . _:vb2054303 "30655" .