Fragments can be listened to here (audio); full transcripts can be downloaded:
Full interviews can be listened to at:
Interviews conducted as part of the oral history project The years of construction 1945-1955 of the Walter Maas House in 1995. This site contains a selection of interview fragments and the full text of the interviews. The full interviews can be listened to at the Netherlands Music Institute.
Destroyed Rotterdam. “Eenig bezit van het Rott. Philharmonisch Orkest: 2 stapeltjes muziek.” Datum: 15/05/1940. NIOD / Beeldbank WO2, foto 64072