1. From gesture to the first word: on cognitive and social prerequisites;Bates,1977
2. Cognition and communication from 9 to 13 months: correlational findings;Bates,1979
3. The biology of symbols: Some concluding thoughts;Bates,1979
4. The development of causal understanding in infancy;Carlson-Luden,1979
5. A study of sensorimotor functioning and communication in mute autistic children;Curcio,1977