Summary of Events
http://volcanoes.usgs.gov/volcanoes/st_helens/st_helens_geo_hist_100.html
FAQs: http://volcanoes.usgs.gov/volcanoes/st_helens/st_helens_sub_page_76.html
2004-2008 Eruption Facts
Edited by David R. Sherrod, William E. Scott, and Peter H. Stauffer (2008)
USGS Professional Paper: 1750
Download .pdf files (includes index of indiv downloads) @ http://pubs.usgs.gov/pp/1750/
Mount St. Helens Geology FAQs
Posted by the USGS Cascades Volcano Observatory
http://volcanoes.usgs.gov/volcanoes/st_helens/st_helens_sub_page_75.html