@misc{michaelis_deposition_of_1989, 
author={Michaelis, W., Schoenburg, M., Stoessel, R. P.},
title={Deposition of atmospheric pollutants into a North German forest ecosystem},
year={1989},
howpublished = {GKSS report},
note = {Michaelis, W.; Schoenburg, M.; Stoessel, R.: Deposition of atmospheric pollutants into a North German forest ecosystem. In: Georgii, H. (Ed.): Mechanisms and effects of pollutant-transfer into forests. Dordrecht: Kluwer. 1989. 3-12.}}