warner bros.
- https://www.dead.net/archives/1971/clippings/warner-brothers-business-card
- https://www.dead.net/archives/1971/clippings/warner-brothers-letter-tower-records
- https://www.dead.net/archives/1971/clippings/warner-brothers-letter-promo-pictures
- https://www.dead.net/archives/1971/clippings/warner-brothers-letter-promo-display
- https://www.dead.net/archives/1971/clippings/warner-bros-advertising-letter-page-2
- https://www.dead.net/archives/1972/clippings/grateful-dead-songbook-front
