"4 sound cassettes (90 min.),"@en . "Oral history interview with Piet Ketelaar"@en . . "The interview was conducted by the Imperial War Museum as part of their retrospective oral history interview program. The United States Holocaust Memorial Museum acquired a copy of the interview with Piet Ketelaar from the Imperial War Museum in February 1995."@en . . . . . . "Imperial War Museum"@en . "irn510831" . "Restrictions on use. Permission to copy and/or use recordings in any production must be granted by the Imperial War Museums."@en . . . . "1987 March 09" . "No restrictions on access"@en .