Molly and Tenbrooks - Bill Monroe and his Blue Grass Boys (December 6, 1947) (cut-off partial)

Bill Monroe - Swing Low Sweet Chariot (1944)

Bill Monroe and His Blue Grass Boys "True Life Blues" Columbia 37151 (1945) Chubby Wise, Tex Willis

Which lineup of musicians established the definitive bluegrass sound known today? Bill Monroe, Earl

Marvin Rainwater - Moanin' The Blues - 1958 Rock N Roll - MGM K12665

Marvin Rainwater - Hey Good Lookin' (Hank Williams Cover)

Bill Monroe & His Blue Grass Boys - Grand Ole Opry - 1939-1951