Mokhtarzadeh, M. , Qomi, M. , Nikafrooz, M. , Atashafrooz, A.. "Hearing Aids Maintenance Training for Hearing-Impaired Preschool Children with the Help of Motion Graphic Tools". World Academy of Science, Engineering and Technology, Open Science Index 167, International Journal of Educational and Pedagogical Sciences, (2020), 14(11), 1064 - 1067.