Jorgenson, M.T., 2012, Ecological recovery after the 1912 Katmai eruption as documented through repeat photography: in Winfree, Robert (project lead), Katmai Science Studies: Alaska Park Science Journal, v. 11, n. 1, p. 66-73, available online at http://www.nps.gov/akso/nature/science/ak_park_science/volume_11_issue_1.cfm .
link to PDF on NPS website