It consisted of the brothers Rolf ( 1939 -- 1981 ) , Kjell ( born 1942 ) , Olle ( born 1950 ) and Jard Samuelson ( born 1952 ) .
It consisted of the brothers Rolf ( 1939 -- 1981 ) , Kjell ( born 942 ) , Olle ( född 1950 ) and Jard Samuelson ( born 1952 ) .