1. Acheson, R.M. (1954) A method of assessing skeletal maturity from radiographs: A report from the Oxford Child Health Survey. Journal of Anatomy (London), 88: 498-508.
2. Individual TW2 Skeletal Maturity in Tokyo Girls.
3. Beunen, G.P., Malina, R.M., Van't Hof, M.A., Simons, J., Ostyn, M., Renson, R., and Van Gerven, D. (1988) Adolescent Growth and Motor Performance—A longitudinal study of Belgian boys. Human Kinetics: Illinois.
4. The Growth of Children
5. Section I, Social and Economic Science