1. Geochemical variation of Arctic margin low-sulfur Cretaceous and Tertiary coals, North Slope, Alaska;Affolter;Open-File Report (U.S. Geological Survey),1992
2. Standard classification of coals by rank, D388-98a;American Society for Testing and Materials (ASTM),1999
3. An improved pretreatment for mineralogical analysis of samples containing organic matter;Anderson;Clays and Clay Mineralogy,1963
4. Cenozoic stratigraphy, unconformity-bounded sequences, and tectonic history of southwestern Washington;Armentrout;Bulletin-Washington. Division of Geology and Earth Resources,1987
5. A rifted origin for the Crescent basalts and related rocks in the northern Coast Range volcanic province, Washington and British Columbia;Babcock;Journal of Geophysical Research,1992