Astuty, A., Rustono, R., Su’udiE. and Mulyani, M. 2017. THE WORD, PHRASE, AND SENTENCE PRODUCTIVITY, AND THE AVERAGE LENGTH OF UTTERANCES AMONG CHILDREN WITH MILD MENTAL RETARDATION. The Journal of Educational Development. 5, 1 (May 2017), 128-135. DOI:https://doi.org/10.15294/jed.v5i1.14305.