boulder
- https://www.dead.net/archives/1972/photos/grateful-dead-folsom-field
- https://www.dead.net/archives/1980/photos/15th-anniversary-publicity-photo15th-anniversary-publicity-photo
- https://www.dead.net/archives/1980/photos/grateful-dead-university-colorado
- https://www.dead.net/archives/1980/photos/jerry-bobby-phil-university-colorado
