00583naa#a2200193#i#450# EN\INFRA-M\bibl\8231 /en/manage/index 20250111235427.6 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 L. fht.editorum.ru /en/manage/index