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	1.	No cover image available Estimating water treatment costs / by Sigurd P. Hansen, Robert C. Gumerman and Russell L. Culp by Hansen, Sigurd P Gumenman, Robert C [jt. aut] Culp, Russell L [jt. aut] United States. Environmental Protection Agency Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: Cincinnati : U.S. Government Printing Office, 1979- Availability: Items available for loan: National Library of India (1)Call number: U.S 628.16 H 198. Place hold Save to lists
	2.	No cover image available Estimating costs for water treatment as a function of size and treatment efficiency / by Robert C. Gumerman, Russell L. Culp, Siguard P. Hansen. by Gumerman, Robert C Culp, Russell L, 1916- Hansen, Sigurd P Ohio. Environmental Protection Agency, Office of Research and Development, Municipal Environmental Research Laboratory [pbl] Springfield, Va. National Technical Information Service Series: Environmental protection technology series Material type: Text; Literary form: Not fiction Language: English Publication details: Cincinnati, Ohio : Springfield, Va. : Environmental Protection Agency, Office of Research and Development, Municipal Environmental Research Laboratory ; For sale by the National Technical Information Service, 1978 Availability: Items available for loan: National Library of India (1)Call number: US 338.43628162. Place hold Request article Save to lists

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