@article {1513, title = {END}, journal = {Problems of Education in the 21st Century}, volume = {79}, year = {2021}, month = {December/2021}, pages = {Continuous}, type = {Other}, chapter = {1011-1014}, abstract = {End page, Vol. 79, No. 6, 2021, PEC}, keywords = {end page}, issn = {1822-7864}, url = {http://oaji.net/articles/2021/457-1639554640.pdf}, author = {Editorial Board} }