%0 Journal Article %T Review of Survey activities 2006: Chalk depth structure maps, Central to Eastern North Sea, Denmark, Top Chalk depth structure map %A Vejb£¿k %A Ole V. et al. %J Geological Survey of Denmark and Greenland Bulletin %D 2007 %I Geological Survey of Denmark and Greenland %U http://www.geus.dk/publications/bull/nr13/nr13_Fig_3A.pdf