@misc{prange_trace_element_1990, 
author={Prange, A.},
title={Trace element analysis},
year={1990},
howpublished = {conference poster: Bremerhaven (D); 26.-28. Juni 1990},
note = {Online available at: \url{} (DOI). Prange, A.: Trace element analysis. In: Nordsee Symposium Bremerhaven. Bremerhaven (D). 1990.}}