Abbas, R.F. et al. 2017. Spectrophotometric Determination of Doxycycline Hyclate in Pure and Capsule using Diazotization Reaction. Al-Mustansiriyah Journal of Science. 27, 5 (Jul. 2017), 50–54. DOI:https://doi.org/10.23851/mjs.v27i5.167.