1. From gesture to first word: On cognitive and social prerequisites;Bates,1977
2. The acquisition of performatives prior to speech;Bates;Merrill-Palmer Q.,1975
3. Early cognitive development in hearing impaired children;Best;Am. Ann. Deaf,1976
4. One Word At a Time;Bloom,1973
5. Semantic and syntactic development: A review of what, when, and how in language development;Bowerman,1978