S. Komar Kawatra Publications Mineral Processing and Coal Preparation Kawatra, S. K., Eisele, T. C. and Dilley, H. L., "A procedure for Evaluating Existing Heavy-Media Coal Preparation Circuits to Enhance Sulfur Removal: A case Study", Chapter 4 in High Efficiency Coal Preparation (ed Kawatra), Society for Mining, Metallurgy, and Exploration, Inc., Littleton, CO, 1995, pp. 55-61. Udupa, A. R., and Kawatra, S. K., "Developments in Gold Leaching," Mineral Processing and Extractive Metallurgy, Vol. 7, 1990, pp. 115-135. Rose, W.I., Paces, J.B., Chesner, C.A., Pletka, B.J., Hellawell, A., Kawatra, S.K., Pilling, J.E., "New Interdisciplinary Engineering Design Course in Planetary Materials and Resource Utilization" Proc. of Space'90,American Society of Civil Engineers, Aerospace/ASCE/ Albuquerque, NM, 1990, pp., 1413-1422 DeLa'O, K. A., Eisele,T. C., Kasul, D. B., Rose W. I., Kawatra, S. K., "Separation of Lunar Ilmenite: Basalt vs. Regolith", Proc. of Space'90, American Society of Civil Engineers, Aerospace /ASCE/ Albuquerque, NM, 1990, pp. 177-186. Kawatra, S. K., Eisele, T. C., and Bagley, S. T., "Studies of Pyrite Dissolution in Pachuca Tanks and Depression of Pyrite Flotation by Bacteria," Biotechnology in Minerals and Metal Processing (B. J. Scheiner, F. M. Doyle and S. K. Kawatra, eds.), Society of Mining Engineers, Littleton, CO, 1989, pp. 55-62. Kawatra, S. K. and Eisele, T.C., "Extraction of Minerals by Bioprocessing," Metallurgical Processes for the Year 2000 and Beyond (H. Y. Sohn and E. S. Geskin, eds.), Minerals, Metals and Materials Society, Warrendale, PA, 1989, pp. 411-425. Kawatra, S. K., Eisele, T. C., and Bagley, S. T., "Coal Desulfurization by Bacteria," Minerals and Metallurgical Processing, Vol. 4, No. 4, 1987, pp. 189-192. Kawatra, S. K., "Coals and Metallic Minerals," Mining Engineering, Vol. 35, No. 5, 1983.