CartwrightG. P. (1968). Written language abilities of normal and educable mentally retarded children. American Journal of Mental Deficiency, 72, 499–508.
2.
CartwrightG. P. (1969). Written expression and spelling. In SmithR. M. (Ed.). Teacher diagnosis of educational difficulties (pp. 95–117). Columbus, OH: Charles E. Merrill.
3.
CohenS., & PlaskonS. (1980). Language arts for the mildly handicapped. Columbus, OH: Charles E. Merrill.
4.
JohnsonW. (1944). Studies in language behavior. I. A program of research. Psychological Monographs, 56, 1–15.
MercerC. D., & MercerA. R. (1985). Teaching students with learning problems (2nd ed.). Columbus, OH: Charles E. Merrill.
7.
PollowayE. A., & SmithJ. E. (1982). Teaching language skills to exceptional learners. Denver, CO: Love Publishing.
8.
StucklessE. R., & MarksC. H. (1966), Assessment of the written language of deaf students. (USOE Cooperative Research Project No. 2544), Pittsburgh: University of Pittsburgh.