@misc{geller_lake_constance_1989, 
author={Geller, W., Guede, H.},
title={Lake Constance: the largest german lake},
year={1989},
howpublished = {conference lecture: Muenchen (D);},
note = {Geller, W.; Guede, H.: Lake Constance: the largest german lake. In: Lampert, W.; Rothhaupt, K. (Ed.): Limnology in the Federal Republic of Germany: 24th Congress of the International Association of Theoretical and Applied Limnology. Muenchen (D). 1989. 9-17.}}