%0 conference paper,conference lecture
%@ 
%A Meissner, R.,Guhr, H.

%D 1994
%J Abstracts of the First International Symposium on Ecosystem Health and Medicine: Integrating Science, Policy and Management
%N 
%P 70-71 

%T The influence of administrative measures of laying up and extensivation in agriculture on the improvement of the nitrogen water quality of the river Elbe
%U 
 
%X