00592naa#a2200181#i#450# EN\INFRA-M\bibl\4673 20241016234656.3 1998-0728 20141217b2014####ek#y0engy0150####ca RUS RU The Integrated Lesson on Technology and the World Around Us: “Borisovsky Clay Sound Toy of the Belgorod Region” (4th grade) Journal article Moscow INFRA-M Academic Publishing LLC. 2014 3 с. Journal article local Ivanov E. Ivashchenko Elena Viktorovna naukaru.ru