Alaska Division of Geological & Geophysical Surveys, 1990, Alaska's high-rank coals: Alaska Division of Geological & Geophysical Surveys Information Circular 33, 36 p. https://doi.org/10.14509/480
Chignik Formation; Coal; Corwin Formation; Cultural Resources; Geochemistry; Historic Resources; Kushtaka Formation; Major Oxides; Matanuska Formation; Measured Stratigraphic Section; Mining; Nanushuk Formation; National Petroleum Reserve in Alaska; Petrology; Resource Assessment; Trace Metals