Schilling, Steve P.; Paul E. Carrara; Ren A. Thompson; Eugene Y. Iwatsubo (2004). «Posteruption glacier development within the crater of Mount St. Helens, Washington, USA». Quaternary Research (Elsevier Science (USA)) 61 (3): 325–329. doi:10.1016/j.yqres.2003.11.002. Bibcode: 2004QuRes..61..325S.
Schilling, Steve P.; Paul E. Carrara; Ren A. Thompson; Eugene Y. Iwatsubo (2004). «Posteruption glacier development within the crater of Mount St. Helens, Washington, USA». Quaternary Research (Elsevier Science (USA)) 61 (3): 325–329. doi:10.1016/j.yqres.2003.11.002. Bibcode: 2004QuRes..61..325S.
Haugerud, R. A.; Harding; Mark; Zeigler; Queija; Johnson (2004-12). «Lidar measurement of topographic change during the 2004 eruption of Mount St. Helens, WA». American Geophysical Union53: 01. Bibcode: 2004AGUFM.V53D..01H.