1. Prevention: a challenge for the profession;American Speech-Language-Hearing Association Committee on Prevention of Speech Language Problems;ASHA,1983
2. The language teaching device;Arkell;Child Care, Health and Development,1986
3. Language and the mind;Chomsky;Psychology Today,1969
4. Developmental assessment: 18 months to 4−12 years. The miniature toys test;Egan;Child Care, Health and Development,1986
5. A developmental exploration of language used to accompany symbolic play in young, normal children;LeNormand;Child Care, Health and Development,1986