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maggadani baitha P, harmita, harahap yahdiana, HUTABALIAN HLN. SIMULTANEOUS IDENTIFICATION AND QUANTIFICATION OF HYDROQUINONE, TRETINOIN AND BETAMETHASONE IN COSMETIC PRODUCTS BY ISOCRATIC REVERSED PHASE HIGH PERFORMANCE LIQUID CHROMATOGRAPHY. Int J App Pharm [Internet]. 2019 May 7 [cited 2022 Nov. 27];11(3):181-5. Available from: https://www.innovareacademics.in/journals/index.php/ijap/article/view/32297