This is the The Dillards - Douglas and Rodney: The lost years / Early Recordings 1959 CD.
Musicians:
Rodney Dillard
Doug Dillard
Dean Webb (later added)
Tracks:
Banjo in the hollow
Old Blue
Rainbow
Katy Kline
East Virginia blues
John Hardy
Rainin' here this morning
Watermelon on the vine
Old man at the mill
Cannonball blues