QUALITATIVE AND QUANTITATIVE CONTENTS OF ORGANIC ACIDS IN MULTIVITAMIN PLANT RAW MATERIALS STUDIED USING VARIOUS PHYSICOCHEMICAL Article Marakhova A.I., Zhilkina V.Yu., Sergunova E.V., Sorokina A.A., Stanishevskii Ya.M., Khachaturyan M.A. Russian Chemical Bulletin. Vol. Vol65. 2016.