Who Knows What Tomorrow May Bring was performed by Phil Lesh & Friends.
Recordings
Traffic, Traffic, 1968 More Heavy Traffic, Traffic, 1975 The Collection, Traffic, 2002 Rock 'N Roll Jam '70, Various Artists (The Mops), 2002 Gold, Traffic, 2005 Paradise Lost and Found, Bill Iuso and the Restless Natives, 2008
More Heavy Traffic, Traffic, 1975