AZIZ RAMADAN, A. and LAHMEK., M. (2010) “Separation and Determination of Phenobarbital and Guaifenesine in Commercial Pharmaceuticals Using Grafted Algerian Bentonite With SE-52 By Gas Chromatography”, Asian Journal of Chemistry, 21(4), pp. 3263–3269. Available at: https://asianpubs.org/index.php/ajchem/article/view/12449 (Accessed: 6 July 2024).