Thurber, Clifford, Murphy, Rachel, Prejean, Stephanie, Haney, Matthew, Bennington, Ninfa, Powell, Lee, and Paskievitch, John, 2012: Earthquake studies reveal the magmatic plumbing system of the Katmai volcanoes: in Winfree, Robert (project lead), Katmai Science Studies: Alaska Park Science Journal, v. 11, n. 1, p. 34-39, available online at http://www.nps.gov/akso/nature/science/ak_park_science/volume_11_issue_1.cfm .
link to PDF on NPS website