My copy of this venerable recording is circa 1960. Of course it's not a CD. If memory serves, the personnel were:

Lester Flatt, guitar
Earl Scruggs, banjo
Josh (Buck) Graves, Dobro
Paul Warren, fiddle
Curly Sechler, mandolin
Hi-Lo Brown, bass

This is just off the top of my head and I haven't verified spellings.

      - Mark