Water and wastewater systems analysis / David StephensonWater resources development in developing countries / David Stephenson, Margaret S. Petersen Margaret S. PetersenWater supply management / by David StephensonPipeline design for water engineers / David StephensonWater resources management / David StephensonPipeline design for water engineers / David StephensonPipeline design for water engineers / David StephensonPipeflow analysis / David StephensonKinematic hydrology and modelling / David Stephenson and Michael E. Meadows