Nurmadina, - and P.L. Gareso, - and N.S. Asri, - and A.P. Tetuko, - and E.A. Setiadi, - The effect of Ni2+ substitution on CoFe2O4 based on natural iron sand using co presipitation metho. International Journal of Engineering and Science Applications Vol 8 No. 1 May 2021.
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