%0 conference lecture %@ %A Schroeder, F., Wiltshire, K. H., Bloecker, G., Klages, D., Mathieu, B., Knauth, H.-D. %D 1993 %J International Symposium on Nutrient Dynamics in Coastal and Estuarine Environments %T The effect of sediments on the nitrogen budget of the Elbe estuary %U %X