Article
- https://www.dead.net/archives/1973/clippings/article-expansion-grateful-dead
- https://www.dead.net/archives/1973/clippings/article-alembic-sound-wizards-grateful-dead-2-2
- https://www.dead.net/archives/1973/clippings/article-alembic-sound-wizards-grateful-dead-1-2
- https://www.dead.net/archives/1973/clippings/article-guitar-player-dead-gear
- https://www.dead.net/archives/1973/clippings/article-guitar-player
- https://www.dead.net/archives/1971/clippings/billboard-article-grateful-dead-lp