The Development of the Ideas of Number and Quantity According to Piaget: a Synthesis and a Criticism.
39 page pamphlet, staple-bound in original printed wrappers (small inked numerals at foot of cover; neatly inked name on halftitle, else clean and near fine). Groningen, Djakarta: J.B. Wolters, 1951. Losse Paedagogische Studien onder redactie van Kohnstamm & Langeveld. More