United States Holocaust Memorial Museum Collection, Gift of Joshua Gibson Funding Note: The cataloging of this collection has been supported by a grant from the Conference on Jewish Material Claims Against Germany. Joshua Gibson donated the materials pertaining to Dr. Nathan Salczberger to the United States Holocaust Memorial Museum in 2008. In 2012, Mr. Gibson, with assistance from Richard Kahn, donated the materials pertaining to Georgette and Erich Kahnt as an accretion to the collection.