concert
- https://www.dead.net/archives/1970/photos/bear-working-amplifiers-fillmore-east
- https://www.dead.net/archives/1970/photos/grateful-dead-playing-fillmore-east-feb-70
- https://www.dead.net/archives/1970/clippings/article-san-francisco-chronicle-ralph-gleason-1
- https://www.dead.net/archives/1970/clippings/article-variety-new-york-city
- https://www.dead.net/archives/1970/clippings/article-rolling-stone-3
- https://www.dead.net/archives/1970/clippings/article-state-college-times-los-angeles