_:vb2555001 . _:vb2555001 . _:vb2555001 "Bundesanstalt f\u00FCr Geowissenschaften und Rohstoffe (BGR)"@en . _:vb2555002 "DE" . _:vb2555002 "Stilleweg 2" . _:vb2555001 . _:vb2555001 _:vb2555002 . _:vb2555002 . _:vb2555002 "Hannover" . _:vb2555002 "30655" .