scientific article
author: Renger Witkamp, Ben van Ommen, John M Nolan, Jeya Kumar Henry, Hans Konrad Biesalski, Robert P. Heaney
Copyright status information is not available for this work. The copyright status depends on the jurisdiction, the author's date of death and the date the work was created or published.
To learn more about copyright terms in different countries, visit the countries and terms page.