Despite the research and refinements that are still to come, many signi- 

 ficant advances in eutrophication and lake-restoration research have been 

 made. Some techniques now available can be and are being used with 

 reasonable success on individual lakes. Other options need to be developed. 

 The continuing interdisciplinary interest in this area of water-resources 

 mangement is heartening. Scientists, engineers, economists, and others 

 working together will ultimately find solutions to save and protect our 

 aquatic habitats. We must act to protect mankind's great natural heritage 

 without destroying it. In trying to find the ways to do it we must cherish 

 the words of Chief Seattle: 



"The earth does not belong to man; man belongs to the earth." 



REFERENCES 



Great Lakes Water Quality. 1972. Agreement with annexes and texts and 

 terms of reference, between the United States of America and Canada. 

 Signed at Ottawa, Canada, April 15, 1972. 75 p. 



Het ling, L.J., and I.G. Carcich. 1973. Phosphorus in wastewater. Water 

 and Sewage Works 120: 59-62 



Likens, G.E. (ed.). 1972. Nutrients and eutrophication: the limiting- 

 nutrient controversy. Special symposia - Vol. 1. Proc. Symposium 

 Michigan State Univ., February 11 and 12, 1971. American Society of 

 Limnology and Oceanography, Inc. 328 p. 



Moore, G.T., and K.F. Kellerman. 1904. A method of destroying or pre- 

 venting the growth of algae and certain pathogenic bacteria in water 

 supplies. Bur. Plant Ind., U.S. Dept. Agric. Bull. 64. 44 p. 



National Academy of Sciences. 1969. Eutrophication: causes, consequences, 

 correctives. Proc. International Symposium on Eutrophication, Univ. 

 Wisconsin, Madison, June 11-15, 1967. Washington, D.C. 661 p. 



National Eutrophication Research Program. 1971. Algal assay procedure 

 bottle test. U.S. Environmental Protection Agency, Corvallis, Ore. 

 82 p. 



Peterson, S.A., W. Smith, and K.W. Malueg. 1974. Full-scale harvest of 

 aquatic plants: nutrient removal from a eutrophic lake. J. Water 

 Pollut. Contr. Fed. 46: 697-707. 



Porcella, D.B., A.B. Bishop, J.C. Anderson, O.W. Asplund, A.B. Crawford, 



W.J. Grenney, D.I. Jenkins, J.J. Jurinak, W.D. Lewis, E.J. Middlebrooks , 

 and R.M. Walkingshaw. 1974. Comprehensive management of phosphorus 

 water pollution. U.S. Environmental Protection Agkency, Washington, 

 D.C. Socioeconomic Environmental Stud. Ser. EPA-600/5-74-010. 411 p. 



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