Washington, D.C., January. U.S. Environmental Protection Agency (1974b) National Strategy for Control of Sulfur Oxides from Electric Power Plants, Washington, D.C., July 10. U.S. Environmental Protection Agency (1974) Implications of Alternative Policies for the Use of Permanent Controls and Supplemental Control Systems (SCS), November 18.


Welch, R.E. (1974) American Smelting and Refining Company, Tacoma, Washington, private communication, December 6.



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement