@misc{_element_concentration_1990, author={ title={Element concentration cadasters in ecosystems: Methods of assessment and evaluation}, year={1990}, howpublished = {book}, note = {Online available at: \url{} (DOI). Lieth, H.; Markert, B. (Ed.): Element concentration cadasters in ecosystems: Methods of assessment and evaluation. Weinheim: VCH. 1990.}}