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Pharmaceutical TechnologyPharmaceutical PreparationsHungarianDrug Delivery SystemsSpectrophotometric DeterminationDissolution RateDrug ReleaseQuantitative DeterminationThin Layer ChromatographyPharmaceutical ChemistryOintment BasesGas ChromatographicDrug ResearchAcetylsalicylic AcidDrug LiberationThin-Layer ChromatographyActive IngredientChromatographic SeparationSalicylic AcidLiquid Chromatographic