1. BARR, A. J., J. H. GOODNIGHT, J. R. SALL, and J. T. HELWIG: A User's Guide to SAS 76. SAS Institute, Raleigh, NC (1976).
2. CAMERON, R. D., and F. A. KOCH: J. Water Pollut. Control Fed.52, 760 (1980).
3. COAL AGE:82, 148 (1977).
4. COWSER, K. E., ed.: Proposed Environmental and Health Program for University of Minnesota Gasification Facility. Oak Ridge National Laboratory, Oak Ridge, TN (1978).
5. DOBSON, J. E., R. M. CUSHMAN, P. J. WALSH, G. A. SAMUELS, D. P. VOGT, J. B. MILLS, S. P. SINGH, P. A. DAUZVARDIS, C. M. MACAL, R. L. KROODSMA, S. O. ULLRICH, JR., A. D. SHEPHERD, and L. M. FREEMAN: Environmental Implications of Small Fixed-Bed Gasifiers for Industry. ORNL/TM-7361. Oak Ridge National Laboratory, Oak Ridge, TN (1981).