http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Twentieth century volcanicity at Mt. St. Helens
the routinization of life near an active volcano : final report
20th century volcanicity at Mt. St. Helens
"Sponsored by the National Science Foundation grant number CEE-8311868."