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	Roger Olsson (violin) Dag Wiren - String Quartet No.2 (1935), op. 9 Roger Olsson (violin) , Wiren Quartet recorded in 2016 at Örebro, Sweden (0) Dag Wiren - String Quartet No.3 (1945), op. 18 Roger Olsson (violin) , Wiren Quartet recorded in 2016 at Örebro, Sweden (1) Dag Wiren - String Quartet No.4 (1953), op. 28 Roger Olsson (violin) , Wiren Quartet recorded in 2016 at Örebro, Sweden (0) Dag Wiren - String Quartet No.5 (1970), op. 41 Roger Olsson (violin) , Wiren Quartet recorded in 2016 at Örebro, Sweden (1)