* Volcanoes of the Alaska Peninsula and Aleutian Islands-Selected Photographs* Alaska Volcano Observatory (Shishaldin webcam)* Michael Wood and Colby Coombs, "Alaska: a climbing guide", The Mountaineers, 2001.
* Volcanoes of the Alaska Peninsula and Aleutian Islands-Selected Photographs* Alaska Volcano Observatory* Michael Wood and Colby Coombs, "Alaska: a climbing guide", The Mountaineers, 2001.