00505naa#a2200157#i#450# EN\\bibl\21540 20240418214817.4 2077-7566 20140625b2014####ek#y0engy0150####ca RU OPTIMIZATION OF METHODS OF PREVENTION OF MAJOR DENTAL DISEASES OF CHILDREN OF PRIMARY SCHOOL AGE AND TEENAGER Journal article Ekaterinburg TIRAZH Publishing House 2014 2 с. Journal article local Zykin A. G. dental-press.ru