TARIGAN, R. E.; ANDRY, M.; DEWI, R. K.; NASUTION, M. A.; LUBIS, M. F. QUANTITATIVE ANALYSIS OF DEXTROMETHORPHAN-HBr, GUAIFENESIN AND DIPHENHYDRAMINE-HCl IN TABLET DOSAGE FORM BY SUCCESSIVE RATIO DERIVATIVE SPECTRA METHOD. Int J App Pharm 2024, 16, 71-75.