1. Limits on the natural environment in terms of pH and oxidation-reduction potentials;Baas Becking;J. Geol.,1960
2. Paleoenvironmentally determined maceral, lithotype, and elemental relationships in two coals of the Cumberland Plateau, Tennessee;Barrett,1979
3. Geochemistry of Coal;Bouska,1981
4. Clay minerals: A guide to their X-ray identification;Carroll;Geol. Soc. Am., Spec. Pap.,1970
5. Paleoenvironment of coal and its relation to drainage quality;Caruccio,1977