Items where Author is "UMAR, ABUBAKAR"
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IYAKA, YAHAYA A. and UMAR, ABUBAKAR and ADENIRAN, MUSIBAU A. (2015) TOTAL AND PLANT AVAILABLE CONTENTS OF COPPER AND ZINC IN URBAN CULTIVATED RICE FARMLANDS. Journal of Applied Chemical Science International, 3 (3). pp. 93-100.