United States Holocaust Memorial Museum Collection, Gift of Ruth Friedman Cohen United States Holocaust Memorial Museum Collection, Gift of Ruth Cohen United States Holocaust Memorial Museum Collection, Gift of Ruth Friedman Cohen United States Holocaust Memorial Museum Collection, Gift of Ruth Cohen Ruth Cohen donated the Friedman family papers to the United States Holocaust Memorial Museum in 2009, 2010, and 2014. Collections accessioned as 2009.348, 2010.73, 2010.466.1, 2014.135.1, and an accretion to 2014.135.1 have been incorporated into this collection.