00542naa#a2200181#i#450# EN\\bibl\35134 20240502012939.4 2077-7566 20200212b2020####ek#y0engy0150####ca RUS RU AGE ASPECTS OF TREATMENT OF TEETH DISCOLORITIS Journal article Ekaterinburg TIRAZH Publishing House 2020 4 с. Journal article local Клиническая медицина. 76.29 grnti Titova Ol'ga Yur'evna dental-press.ru