billboard
- https://www.dead.net/archives/1970/clippings/article-billboard-cincinnati
- https://www.dead.net/archives/1970/clippings/advertisement-billboard-workingmans-dead-single
- https://www.dead.net/archives/1971/clippings/press-clip-billboard
- https://www.dead.net/archives/1971/clippings/press-clip-billboard-0
- https://www.dead.net/archives/1971/clippings/press-clip-billboard-1
- https://www.dead.net/archives/1971/clippings/billboard-article-grateful-dead-lp
