Statistical Methods to Apportion the Sources of Particles in the Industrial Region of Estarreja-Portugal.- The Distribution of Monthly Rainfall Intensity at Some Sites in Saudi Arabia.- The Economics of Transboundary Air Pollution in Europe.- True and False Positive Rates in Maximum Contaminant Level Tests.- Statistical Analysis of Effects of Measures Against Agricultural Pollution.- Air Pollution and Diseases of the Respiratory Tracts in Pre-School Children: A Transfer Function Model.- The Niagara River: A Water Quality Management Overview.- Time Series Valued Experimental Designs: A Review.- Extent of Acidification in Southwestern Quebec Lakes.- A Statistical Approach to Field Measurements of the Chemical Evolution of Cold (