1. Bronks, R. and Parker, A.W.: Anthropometric observation of adults with Down syndrome:Am. J. Ment Defic.,90 (1): 110-3(1985).
2. Carter, J.E.L. and Heath, B.H.Somatotyping - Development and Applications. Cambridge Studies in Biological Anthropology, Cambridge University Press, Cambridge (1990).
3. Carter, J.E.L., Ross, W.D., Duquet, W. and Aubry, S.P.: Advances in somatotype methodology and analysis:Yearbook of Physical Anthropology, 26: 193–213 (1983).
4. Weiner, J.S. and Lourie, J. A.Human Biology: A Guide to Field Methods. Blackwell scientific Publications. Oxford (1969).