the spectrum
- https://www.dead.net/archives/1979/road-trips/road-trips-vol-1/grateful-dead-walk-again-spectrum-stage
- https://www.dead.net/archives/1993/clippings/backstage-pass-spectrum
- https://www.dead.net/archives/1993/clippings/backstage-pass-spectrum-0
- https://www.dead.net/archives/1993/clippings/backstage-pass-spectrum-1
- https://www.dead.net/archives/1995/photos/bob-weir-spectrum
