. . . . "Restrictions on use. Restrictions may exist. Contact the Museum for further information: reference@ushmm.org\n\nCopyright Holder: Mark Klempner"@en . . "No restrictions on access"@en . . . . "1 sound cassette (90 min.),"@en . . . "Translation of Clara Dijkstra\n\nMusic of Ravensbruck, Hoor de Vrouwen Zinger 1944-1945"@en . "Mark Klempner donated his collection of oral history interviews and transcripts to the United States Holocaust Memorial Museum on April 22, 2007. The recordings were used as primary source material for Klempner's book\"The Heart Has Reasons: Holocaust rescuers and their stories of courage\" published in 2007."@en . "irn619925" .