_:vb2251415 . _:vb2251415 . _:vb2251415 "Bundesanstalt f\u00FCr Geowissenschaften und Rohstoffe (BGR)"@de . _:vb2251416 "Deutschland" . _:vb2251416 "30655" . _:vb2251415 _:vb2251416 . _:vb2251416 . _:vb2251415 . _:vb2251416 "Stilleweg 2" . _:vb2251416 "Hannover" .