Geological Survey (U.S.) & Gough, L. P. (2005). Geochemical landscapes of Alaska: New map presentations and interpretations for 23 elements in surficial materials. U.S. Dept. of the Interior, U.S. Geological Survey.

Geological Survey (U.S.) and L. P. Gough. Geochemical Landscapes of Alaska: New Map Presentations and Interpretations for 23 Elements in Surficial Materials. Reston, VA: U.S. Dept. of the Interior, U.S. Geological Survey, 2005.

Geological Survey (U.S.) and L. P. Gough. Geochemical Landscapes of Alaska: New Map Presentations and Interpretations for 23 Elements in Surficial Materials. U.S. Dept. of the Interior, U.S. Geological Survey, 2005.