@misc{wilken_mercury_and_1990, 
author={Wilken, R.-D., Hintelmann, H.},
title={Mercury and methylmercury in sediments and suspended particles from the river Elbe, North Germany},
year={1990},
howpublished = {conference lecture: Gaevle (S);},
note = {Wilken, R.; Hintelmann, H.: Mercury and methylmercury in sediments and suspended particles from the river Elbe, North Germany. Mercury as an Environmental Pollutant. Gaevle (S), 1990.}}