Drawn from two San Francisco concert recordings recently discovered in the Grateful Dead's vaults, the 25 country rock tracks (plus demos of ``Thousand Dollar Wedding'' and ``When Will I Be Loved") on these two discs represent the first unheard Parsons vocals released in decades. And he's in fine voice, skillfully hitting the harmonies with Chris Hillman, but just shaky enough to let you know it's doomed, delicate Gram. Lots of Burritos classics and a few tunes we've never heard them do before are here. The revelation is ``You Win Again,'' the Gram-meets-Hank heartbreaker that you just knew must exist in some died-too-young hillbilly heaven. Package includes a terrific booklet with never-before-published photos and liner notes by Pamela Des Barres.