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	1.	No cover image available Hydrogen peroxide cures filamentous growth in activated sludge / by Charles A. Cole, John B. Stamberg and Dollof F. Bishop by Cole, Charles A Stamberg, John B Bishop, Dollof F United States. Office of research and development Series: Environmental Protection Technology Series Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: Washington, D.C. : United States Government Printing Office, 1973 Availability: Items available for loan: National Library of India (1)Call number: U.S. 363.73 C 674 h. Place hold Request article Save to lists
	2.	No cover image available Water conservation and reuse : why conserve water? .../ illustrations by Charles A Cole and Charles Speers by United States. Environmental Protection Agency. Office of Water Program Operations Cole, Charles A [ill] Speers, Charles [ill] Material type: Text; Literary form: Not fiction Language: English Publication details: [Washington, D.C.?] : [U.S. Environmental Protection Agency], 1980 Availability: Items available for loan: National Library of India (1)Call number: US 333.720973. Place hold Request article Save to lists

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