Publication

Number of items: 2.
R
  • The National Survey of health and development: 2. Rate of school progress between 8 and 15 years and between 15 and 18 years. (1971) Ross, J. M., Simpson, H. R.
  • The national survey of health and development: 1. Educational attainment. (1971) Ross, J. M., Simpson, H. R.