Sources
- (adapted public domain text)
Further reading
External links
- List of victims with biographical details
- USGS: Mount St. Helens 1980 Debris Avalanche Deposit
- USDA Forest Service: Mount St. Helens VolcanoCam
- Pre-1980 Eruptive History of Mount St. Helens, Washington
- USGS: Before, During, and After May 18, 1980
- Boston.com – The Big Picture – 30 years later
- Aerial pictures of the July 22nd, 1980, secondary eruption
- News reports at The Museum of Classic Chicago Television