Harry Wachs

Piaget i praktiken : att utveckla barns tänkande  Hans G. Furth Harry Wachs Häftad. Natur och Kultur, 1980-01 ISBN 9789127623347     Thinking Goes to School: Piaget's Theory in Practice  Hans G. Furth Harry Wachs Paperback. Oxford University Press, 1982-07-01 ISBN 9780195019278     Thinking Goes to School: Piaget's Theory in Practice  S. Furth Harry Wachs Hardcover. Oxford University Press, 1974-04-25 ISBN 9780195017298     Thinking Goes to School  Hans G Furth Harry Wachs eBook. Oxford University Press, 1974-02-07 ISBN 9780198020141