Parise, M., J.A. Coe, W.Z. Savage, and D.J. Varnes. 2003. The Slumgullion landslide (south-western Colorado, USA): investigation and monitoring. International Workshop on Occurrence and Mechanisms of Flows in Natural Slopes and Earthfills, IW-Flows2003, Sorrento, May 14-16, 2003. http://ww.unina2.it/flows2003/flows2003/articoli/articoli.htm. Accessed 12/3/10.
USGS Landslide Photo Collection.