_:vb2057961 _:vb2057962 . _:vb2057961 "Bundesanstalt f\u00FCr Geowissenschaften und Rohstoffe (BGR)"@de . _:vb2057962 "Stilleweg 2" . _:vb2057961 . _:vb2057961 . _:vb2057961 . _:vb2057962 "DE" . _:vb2057962 "30655" . _:vb2057962 . _:vb2057962 "Hannover" .