Statistical methods for the assessment of point source pollution : proceedings of a workshop on statistical methods for the assessment of point source pollution, held in Burlington, Ontario, Canada / ed. by D.T. Chapman and A.H. El-ShaarawiStatistical methods for the environmental sciences : a selection of papers presented at the Conference on Environmetrics, held in Cairo, Egypt, April 4-7, 1989 / ed. by A.H. El-ShaarawiStatistical methods for the environmental sciences : a selection of papers presented at the Conference on Environmetrics, held in Cairo, Egypt, April 4-7, 1989 / ed. by A.H. El-ShaarawiTime series methods in hydrosciences : proceedings of an international conference held at Canada Centre for Inland Waters, Burlington, Ontario, Canada, October 6-8, 1981 / ed. by A.H. El-Shaarawi ; in collab. with S.R. EsterbyStatistical aspects of water quality monitoring : proceedings of the workshop held at the Canada Centre for Inland Waters, October 7-10, 1985 / ed. by A.H. El-Shaarawi and R.E. Kwiatkowski