Geological Survey Circular 318 Eruption of Trident Volcano — Katmai National Monument, Alaska — February-June, 1953

Coats, Robert R., 1950, Volcanic activity in the Aleutian arc: U. S. Geol. Survey Bull. 974-B.

Griggs, Robert F., 1922, The Valley of Ten Thousand Smokes: Natl. Geog. Soc., p. 29, 31, 98.