Letters to the Editor

Letters to the editor:

—Subject: Zinn, C. D. and Lesso, W. G., “Putting the Economics in Best Available Control Technology or Pollutants in the Air and Dollars to the Wind,” Interfaces, Vol. 9, No. 1, November 1978, pp. 68–71, by Michael Shapiro, Department of City and Regional Planning, Harvard University, Gund Hall, Room 311, Cambridge, Massachusetts 02138;

—Authors' reply by William Lesso and C. Dale Zinn, College of Engineering and Center for Energy Studies, University of Texas, Austin, Texas 78712;

—Letter by Fraser Dunford, Faculty of Administrative Studies, University of Manitoba.