title: [Effect of vitaminization in concentrated mental activity].
mesh_terms: D000328:Adult; D006801:Humans; D005222:Mental Fatigue / Q000187:drug effects*; D014815:Vitamins / Q000627:therapeutic use*
chemical_list: D014815:Vitamins
vernacular_title: Vliianie vitaminizatsii pri napriazhennoĭ umstvennoĭ deiatel'nosti.