letter
- https://www.dead.net/archives/1967/clippings/jerry-garcias-letter-fans
- https://www.dead.net/archives/1967/clippings/angry-letter-warner-brothers-page-1-2
- https://www.dead.net/archives/1967/clippings/angry-letter-warner-brothers-page-2-2
- https://www.dead.net/archives/1971/clippings/letter-grateful-dead-dance-marathon-1-2
- https://www.dead.net/archives/1971/clippings/letter-grateful-dead-dance-marathon-2-2
- https://www.dead.net/archives/1971/clippings/warner-brothers-letter-tower-records
