Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part
of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open
content license such as Creative Commons.
Source:
Mitteilung 197 der Versuchsanstalt für Binnenschiffbau, Duisburg, Germany, Vorabdruck aus der Zeitschrift für Binnenschiffahrt und Wasserstrassen, Heft 6, 1981
