Incoming Resources
- An outline of Piaget's developmental psychology for students and teachers,, by Ruth M. Beard
- The origins of intellect, Piaget's theory, John L. Phillips, Jr
- Three theories of child development, the contributions of Erik H. Erikson, Jean Piaget, and Robert R. Sears, and their applications, Henry W. Maier
- Piaget's theory of cognitive and affective development, Barry J. Wadsworth ; with drawings by the author
- Piaget's theory, a primer, John L. Phillips, Jr