United States Holocaust Memorial Museum Collection, Gift of the Family of Melvin Yonack United States Holocaust Memorial Museum Collection, Gift of Ralph Yonack Ralph Yonack donated the Melvin Yonack papers to the United States Holocaust Memorial Museum in 1993, 1995, and 2000. Accessions formerly cataloged as 1993.132, 1995.84, and 2000.614.1 have been incorporated into this collection.