script prepared by Robert Karplus and Rita Peterson . translated and edited by Dana Sardet . producer, Marcus Krigbaum ; executive producer, Gregory Sparlin ; director, Roy Anthony Cox
Davidson Films[n.d.]Special projects
. Classic Piaget collection ; v. 2
script prepared by Robert Karplus and Celia Stendler . interviews by Celia Stendler Lavatelli and Queenie B. Mills ; script consultant, Leo S. Lavatelli
Davidson Films[n.d.]Special projects
. Classic Piaget collection ; v. 1 . Piaget's developmental theory
