Piaget, Jean, 1896- The child's conception of geometry / by Jean Piaget, Barbel Inhelder and Alina Szeminska ; translated from the French by E. A. Lunzer - New York : Basic Books, 1960 - 411 p. : ill. ; 23 cm. Translation of La geometrie spontanee de l'enfant LCCN: 60-007177 Subjects--Topical Terms: Geometry concept