1. Developmental stages and developmental processes;Beilin,1971
2. An analytic-empirical study of sequence in curriculum development;Beilin,1970
3. Levels of expertise in early childhood teaching: An initial field test of a diagnostic instrument;Benjamin,1989
4. Toward a solution of the learning paradox;Bereiter;Review of Educational Research,1985
5. Roots of language;Bickerton,1981