https://www.dead.net/archives/1971/clippings/warner-brothers-advertising-letter
https://www.dead.net/archives/1971/photos/grateful-dead-lp-sales-display
https://www.dead.net/archives/1971/clippings/billboard-article-grateful-dead-lp
https://www.dead.net/archives/1970/clippings/advertisement-los-angeles-free-press-dead-show-american-beauty
https://www.dead.net/archives/1970/clippings/advertisement-jazz-pop-american-beauty
https://www.dead.net/archives/1970/clippings/advertisement-grateful-dead-show