Jean Piaget/ Barbel Inhelder
(4)
Brbel Inhelder/ Jean Piaget
(1)
Jean Piaget,Joan Tomlinson,Andrew Tomlinson
(1)
Jean Piaget/ Barbel Inhelder/ Alina, Szeminska
(1)
Jean Piaget/ Brbel Inhelder
(1)
Jean Piaget/ D. N. Smith (TRN)
(1)
Jean Piaget/ E. Claparede (INT)/ Marjorie Warden (TRN)
(1)
Jean Piaget/ G. N. Seagrim (TRN)
(1)
Jean Piaget/ Gil Henriques/ Edgar Ascher/ Terrance Brown (EDT)
(1)
Jean Piaget/ Gil Henriques/ Edgar Ascher/ Terrance Brown (TRN)
(1)
Jean Piaget/ Helga Feider (TRN)/ E. Ackermann-valladao (CON)/ I. Berthoud-Papandropoulou (CON)/ A. Blanchet (CON)
(1)
Jean Piaget/ Jaan Valsiner (INT)
(1)
Jean Piaget/ Leslie Smith (EDT)
(1)
Jean Piaget/ Malcolm Piercy (TRN)/ D. E. Berlyne (TRN)
(1)
Jean Piaget/ Margaret Cook (TRN)
(1)
Jean Piaget/ Paul Fraisse/ Maurice Reuchlin
(1)