Okereke, O
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UNDERGROUND WATER QUALITY OF ROCK MINING IN ISHIAGU, EBONYI..:

Obiekezie, S. O ; Okereke, J. N ; Anyalogbu, E..
https://periodicos.pucpr.br/index.php/estudosdebiologia/article/view/22724/21818.  , 2006
 
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BACTERIAL QUALITY OF RAINWATER IN SELECTED COMMUNITIES IN I..:

Okereke, J. N ; Obasi, K. O ; Obiekezie, S. O.
https://periodicos.pucpr.br/index.php/estudosdebiologia/article/view/22723/21825.  , 2006
 
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