grateful dead
- https://www.dead.net/archives/1971/photos/grateful-dead-lp-promo-display-1
- https://www.dead.net/archives/1971/clippings/warner-brothers-letter-promo-display
- https://www.dead.net/archives/1971/clippings/billboard-article-grateful-dead-lp
- https://www.dead.net/archives/1971/clippings/warner-brothers-advertising-letter
- https://www.dead.net/archives/1971/clippings/warner-bros-advertising-letter-page-2
- https://www.dead.net/archives/1971/clippings/press-billboard
