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1.
Sources of toxic pollutants found in influents to sewage treatment plants/ by P. Levins ... [et al.] by
Material type: Text Text; Format: print ; Literary form: Not fiction
Language: English
Publication details: Washington DC. : U. S. Environmental protection agency, Office of water planning & standards, Monitoring and Data support Division ; United States, Government Printing Office, 1979
Availability: Items available for loan: National Library of India (1)Call number: US 363.7384 Un 31(v.5).

2.
Sources of toxic pollutants found in : influents to sewage treatment plants muddy creek drainage basin, cincinnati, ohio / by P. Levins ... [et al.] by
Material type: Text Text; Format: print ; Literary form: Not fiction
Language: English
Publication details: Washington, D.C. : U.S. of Government Printing Office, 1981
Availability: Items available for loan: National Library of India (1)Call number: U.S 639.300973 So 84.

3.
Sources of toxic pollutants found in influents to sewage treatment plants / by P. Levins... [et al.]. by
Material type: Text Text; Format: print ; Literary form: Not fiction
Language: English
Publication details: Washington, D.C. : The Agency, 1981
Availability: Items available for loan: National Library of India (1)Call number: US 628.16809758.

                                                                           
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