1. Spectrochemical analyses of coal ash for trace elements;Abernathy;U.S. Bur. Mines Rept. Inv.,1969
2. Paleoenvironmentally determined maceral, lithotype, and elemental relationships in two coals of the Cumberland Plateau, Tennessee;Barrett,1979
3. A study of elemental and maceral distribution in coals of different paleoenvironments;Barrett;Geol. Soc. Am., Abstracts with Programs,1979
4. Role of clay minerals in the transportation of iron;Carroll;Geochim. Cosmochim. Acta,1958
5. Sulfur in peat-forming systems of the Okefenokee Swamp and Flirda Everglades: Origins of sulfur in coals;Casagrande;Geochim. Cosmochim. Acta,1977