00546naa#a2200181#i#450# EN\INFRA-M\bibl\8231 20240510030507.5 1998-0728 20151019b2015####ek#y0engy0150####ca RUS RU Situational Assignments in the Ecological Education of Primary School Children Journal article Moscow INFRA-M Academic Publishing LLC. 2015 4 с. Journal article local Grineva E. Davletshina LANDYSH KHANIFOVNA naukaru.ru