Mohammad, Mohammad Radi, and Hasanain Saad Azeez. “Effect of the Acidic and Alkaline Solutions on K2CrO4 and K2Cr2O7 by Ultraviolet and Visible Measurement”. Al-Mustansiriyah Journal of Science, vol. 30, no. 1, Aug. 2019, pp. 221-4, https://doi.org/10.23851/mjs.v30i1.722.