. "United States Holocaust Memorial Museum Collection, Gift of Marion Wetterhahn Sanders and Mark Wetterhahn\n\nFunding Note: The accessibility of this collection was made possible by the generous donors to our crowdfunded Save Their Stories campaign.\n\nMark Wetterhahn and Marion Sanders, Julius and Gertrud’s children, donated the Jäckel and Wetterhahn family papers to the United States Holocaust Memorial Museum in 2017."@en . .