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1.
Systems analysis for water quality management-survey and abstracts / Enviro Control, inc by
Material type: Text Text; Format: print ; Literary form: Not fiction
Language: English
Publication details: Washington, D. C. : Office of Water Programs, United States Environmental Protection Agency ; United States Government Printing Office, 1970
Availability: Items available for loan: National Library of India (1)Call number: U.S 363.739460973 En 89.

2.
Systems analysis for water quality management-survey and abstracts / Enviro Control, inc by
Material type: Text Text; Format: print ; Literary form: Not fiction
Language: English
Publication details: Washington, D. C. : Office of Water Programs, United States Environmental Protection Agency ; United States Government Printing Office, 1970
Availability: Items available for loan: National Library of India (1)Call number: U.S 363.739460973 En 89.

                                                                           
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