"irn36907" . . . . . . . . . "The collection consists of artifacts used or discovered by Yahad-in Unum during their work to investigate and to document the mass executions of more than 2 million Jews in Eastern Europe between 1941 and 1944 by Nazi Germany and those who collaborated with therm."@en . . . . . . . . . . . . . . . . "The Yahad-In Unum Collection at the United States Holocaust Memorial Museum"@en . . . . . . . . . . . . . . . . . . . . . .