Recorded August 11 & September 9, 1960, Nashville. Personnel (except for "Ground Speed") is:
Lester Flatt: guitar; Earl Scruggs: banjo/leader; Burkett H. 'Buck' Graves: dobro; English P. 'Jake' Tullock, Jr: string bass; Paul Warren: fiddle; Murray M. 'Buddy' Harman, Jr: drums.
The info is from discography to Flatt & Scruggs 1959-1963 (Bear Family).
~Masato