1. Wm. Ashton , 1979 . An Incomplete Guide to Water Conservation: Residential Water Conservation . Faculty of Environmental Studies, Department of Man-Environment Studies, University of Waterloo, Waterloo, Ontario.
2. Wm. Ashton , 1982 . Urban Growth and Water Supply Management: Land Use Planning and Water Conservation in the Calgary Region . Master's Degree Project (Urban and Regional Planning), University of Calgary.
3. City of Calgary , 1981 . Report to Operations and Development Committee: Public Education Proposal for Water Conservation Program . City Clerks Office, Calgary.