1. Field relationships of delerite intrusions in the Natal coalfields;Blignault;Trans. Geol. Soc. S. Afr.,1952
2. Microscopic measurement of the level of catagenesis of solid organic matter in sedimentary rocks to aid exploration for petroleum and to determine for burial temperature. A review;Bostick,1979
3. Petrography and programmed pyrolysis of coal and natural coke intruded by an igneous dike, Coal Basin, Pitkin County, Colorado;Bostick;Geol. Soc. Am.,1987
4. Use of reflectance in evaluating temperature of carbonized or thermally metamorphosed coal;Chandra;Fuel,1965
5. An introduction to the Rock Forming Minerals;Deer,1980