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Rao, A.L.J., Puri, B.K. Polarographic determination of Cd, Co, Mn, Zn, Te(IV) and Cr(VI) in sodium azide solution. Z. Anal. Chem. 254, 362–363 (1971). https://doi.org/10.1007/BF00423462
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DOI: https://doi.org/10.1007/BF00423462