%0 conference lecture %@ %A Bernem, K.-H.van,Krasemann, H.L.,Lisken, A.,Mueller, A.,Patzig, S.,Riethmueller, R. %D 1989 %J ARC-INFO, The Fourth Annual ESRI European User Conference %N %P %T WATiS – an information system for the German Wadden Sea %U %X