Betty Nelson's Organic Raspberry Farm
- https://www.dead.net/archives/1968/clippings/article-downbeat-about-sky-river-festival
- https://www.dead.net/archives/1968/photos/jerry-sky-river-festival
- https://www.dead.net/archives/1968/photos/sky-river-festival-jerry-billy-phil-bobby
- https://www.dead.net/archives/1968/photos/phil-and-rosie-sky-river-festival
- https://www.dead.net/archives/1968/photos/phil-looking-his-amp-sky-river-festival
- https://www.dead.net/archives/1968/photos/bobby-singing-sky-river-festival