1. The day the sky fell;Findley;National Geographic,1981
2. Mount St Helens ash from the 18 May 1980 eruption: Chemical, physical, mineralogical, and biological properties;Biology Department, Battelle Memorial Institute, Pacific Northwest Laboratory;Science,1980
3. Deaths Around the Volcano;Reay,1980
4. Potential Hazards from Future Eruptions of Mount St Helens Volcano;Crandell;US Geological Survey Bulletin 1383-C,1978
5. Mount St Helens: Researchers sort the data;Waldrop;Science,1980