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Direct and Derivative Spectrophotometric Determination of Cobalt(II) Using 3,5-Dimethoxy-4- hydroxybenzaldehydebenzoylhydrazone (DMBBH). J. Int. Acad. Phys. Sci. [Internet]. 2011 Jun. 15 [cited 2026 Oct. 23];15(2):249-57. Available from: http://www.iaps.org.in/journal/index.php/journaliaps/article/view/605