Ottawa, Ontario: Ontario Department of Energy. Very Good with no dust jacket; Text is clean. Cover shows normal wear, light rubbing along spine. Previous onwer name and datestamp on front free endpaper. 1968. Paperback. From the preface: This publication originates from a seminar on the methods for forecasting the demand for water, held in Vancouver in December 1967. Although the papers incorporated in this volume have been edited and revised for publication, they represent the essence of the discussion generated at the seminar. .