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	1.	Guidelines for the safe use of wastewater and excreta in agriculture and aquaculture / prepared by Duncan Mara & Sandy Cairncross by Mara, Duncan World Health Organization Cairncross, Sandy Material type: Text; Format: print ; Literary form: Not fiction Language: Publication details: Geneva, 1989. Availability: Items available for loan: Afghanistan Centre at Kabul University (1)Call number: B 16.33 MAR -4080 .
	2.	Sewage treatment in hot climates / Duncan Mara by Mara, Duncan Material type: Text; Format: print ; Literary form: Not fiction Language: Publication details: Great Britain : English Language Book Society, 1976 r1982. Availability: Items available for loan: Afghanistan Centre at Kabul University (1)Call number: B 16.5 MAR -4162 .

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