Clarke Stewart, A. & Friedman, S. Child Development: Infancy through Adolsecence. New York: John Wiley, ١٩٨٧.
Clayton, V. & Overton, W.F. Concrete and Formal Operational Thought Processes in Young Adulthood and Old Age. International.١. of Aging & Human Develop., I٩٧٦ , ٧, ٢٣٧-٢١٥.
Cole, J.O. & Bcrrctt, C.J. "Ed." ogy Id the Aged.
New York: Raven Press, ١٩٨٠.
Commons, M.L., Richard, F.A. & Annan, C. Beyond Formal Operations: ceand Abult Cog-
nitive Development. New York: Praegcr, ١٩٨٢.
Commons, ML.: Adult development "vol. ١". New York: Praeger& Greenwood, ١٩٨٩.
Conger, J.J. & Peterson, A. C. Adolescence and Youth. Cam- bridge: Harper & Row "٣rd Ed.", ١٩٨٤.
Copans, S. A. Human Prenatal Effects: Methodological Problems and Some Suggested Solutions. Merrill-Plamer Quart., ١٩٧٤, ٢٠, ٤٣-٥٢.
Crai"-. G.J. Human Development. WWnglewood Cliffs, N.J.: Prentice-Hall, ١٩٨٦.
Craik, F.J. M. Age Differences in Human Memory. In ; Birren, J.E. & Schaie, K.W. "Eds.", ١٩٧٧.
Craik, F.t. M. & Treub, S. "Eds." Aging and Cognitive Processes. New York: Plenum, ١٩٨٠.
Cumming, E. & Henry, W.E. Growing Old. New York: Basic Books, ١٩٦١.
Croplcy, A. J. "Ed." Towards a System of Lifelong
Hamburg:Unesco institute of Education, ١٩٨٦.
Darwin, C. A Biographical Sketch of an Infant. Mind, ١٨٧٧, ٢, ٢٨٥-٢٩٤.
Dasen, P.R Cross-Cultural Piagetion Research: A Summary, J. of Cross-Cultural Psyehol., ١٩٧٢,٣,٢٣-٣٩.
Daton, N., Green, A.L. & Reese, H.W. Lifespan Developmen-
Datoit, N., Green, A.L. & Reese, H.W. Lifespan Developm