(2011). Study of Acid Rain in Tikrit City. , 18(1), 69-79.
. "Study of Acid Rain in Tikrit City". , 18, 1, 2011, 69-79.
(2011). 'Study of Acid Rain in Tikrit City', , 18(1), pp. 69-79.
Study of Acid Rain in Tikrit City. , 2011; 18(1): 69-79.


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