@misc{michaelis_technologies_in_1989, 
author={Michaelis, W.},
title={Technologies in environmental monitoring and assessment},
year={1989},
howpublished = {conference lecture: Hamburg (D);},
note = {Michaelis, W.: Technologies in environmental monitoring and assessment. In: Hoefeld, J.; Mitzlaff, A.; Polomsky, S. (Ed.): International Conference Europe and the Sea, Marine Sciences and Technologies in the 1990's. Hamburg (D). 1989. 158-178.}}