Dick's Picks #29 is six discs: May 19, 1977 and May 21, 1977

[Dave S]

5/19/77 Fox Theatre, Atlanta, GA is complete on 3 cds

and

5/21/77 Lakeland Civic Center Arena, Lakeland, FL is on 3 cds and is 
missing the U.S. Blues encore .

http://dead.net/dicks_picks/DECD213/index.html

Dave S.