1. Comparison of observed and predicted visual effects from power plant plumes;Bergstrom,1981
2. Color discrimination of twelve observers;Brown;J. opt. Soc. Am.,1957
3. Characterization of Navajo generating station emissions measured during the June-July 1979 VISTTA field program;Candelaria,1980
4. Optical properties and visual effects of smoke-stack plumes;Conner;U.S. SEPA Publication No. AP-30,1967
5. Visual Perception;Cornsweet,1970