La epistemología del espacio /

by Piaget, Jean, 1896-1980 (Jean William Fritz Piaget) 7534, Gréco, Pierre 25656, Grize, Jean Blaise 26970, Bang, Vinh 26975
Published 1971

La epistemología del tiempo /

by Piaget, Jean, 1896-1980 (Jean William Fritz Piaget) 7534, Grize, Jean-Blaise 26970, Henry, Katleyn 26971, Meylan-Backs, Marianne 26972, Orsine, Francine 26973, Bogaert-Rombouts, N. van den 26974
Published 1971