philadelphia
- 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
