Dedhiya, P.P. 2021. QbD-based Simultaneous Estimation of Chlorpheniramine Maleate, Dextromethorphan Hydrobromide and Guaifenesin in its Combined Dosage Form Using High-Performance Thin-Layer Chromatographic Method. International Journal of Pharmaceutical & Biological Archive. 12, 4 (Dec. 2021). DOI:https://doi.org/10.22377/ijpba.v12i4.1965.