TY JOUR TI Speech development of primary school children diagnosed with mild mental retardation in the activity of verbal creativity KW speech development KW primary school children KW diagnosis of mild mental retardation KW activity KW verbal creativity JO Living psychology AU Kuznetsova, E.. AU Samoilova, M.. AU Grekhova, I.. PY 2019 IS 6 PB Ltd Radomir-M+