1. The effects of social and isolate toys on the interactions and play of integrated and non-integrated groups of preschoolers;Beckman;Educ. Training Ment. Retarded,1984
2. Interactions of preschoolers with and without handicaps in integrated and segregated settings: A longitudinal study;Beckman;Ment. Retardation,1987
3. Dyadic interactions between children with and without mental retardation: Effects of age discrepancy;Cole;Am. J. ment. Defic.,1987
4. Toys and social interaction between infant peers;Eckerman;Child Dev.,1977
5. Classroom Organisation;Gunstone,1982