Amsterdam, Becht, zonder jaar. Paperback, 21 cm, 239 pp. Over hoe het zwakke geslacht toch eigenlijk weer sterker is. Mooie jaren vijftig/zestig praat. Cond.: goed / good.
The growth of logical thinking. From childhood to adolescence. An essay on the construction of formal operational structures. Translated by Anne Parsons and Stanley Milgram.
London, Routledge & Kegan Paul, 1972. 4th impression Hardcover with dustjacket, 22 cm, 356 pp. Cond.: goed / good. ISBN: 0710019505.
Mental Imagery in the Child: A Study of the Development of Imaginal Representation.
London, Routledge & Kegan Paul, 1971. Cloth with dustjacket, 22 cm, 396 pp. Dustjacket with stains and some minor damages. Cond.: goed / good. ISBN: 0710069219.