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	1.	Gravity flow water systems : reasons for failure; references [from the M.Sc. thesis of] J.B. Pollock. by Pollock, J. Bruce Material type: Text; Format: print ; Literary form: Not fiction Publication details: [S.l. : s.n.], 1986. Availability: Items available for loan: Afghanistan Centre at Kabul University (1)Call number: Pamphlet Z 7935 .P655 1986 .
	2.	Standard procedures for the implementation of gravity flow water supplies / J. Bruce Pollock by Pollock, J. Bruce UNICEF Material type: Text; Format: print ; Literary form: Not fiction Language: Publication details: Peshawar, 1989. Availability: Items available for loan: Afghanistan Centre at Kabul University (1)Call number: R 6.31 POL -4112 .
	3.	Standard design manual for gravity flow water system / J. Bruce Pollock by Pollock, J. Bruce UNICEF Material type: Text; Format: print ; Literary form: Not fiction Language: Publication details: Peshawar, 1989. Availability: Items available for loan: Afghanistan Centre at Kabul University (1)Call number: R 6.31 POL -4113 .

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