@misc{lieth_element_concentration_1990, 
author={Lieth, H.,Markert, B.},
title={Element concentration cadasters in ecosystems: State of the art and further plans for the development of an international research program till 1990},
year={1990},
howpublished = {book part},
note = {Online available at: \url{} (DOI). Lieth, H.; Markert, B.: Element concentration cadasters in ecosystems: State of the art and further plans for the development of an international research program till 1990. In: Lieth, H.; Markert, B. (Ed.): Element concentration cadasters in ecosystems: Methods of assessment and evaluation. Weinheim: VCH. 1990. 3-14.}}