By David Phoenix, Phoenix, David
By Ewart Smith, L. Bostock, A. Shepherd, F. S. Chandler, Smith, Ewart, Bostock, L., Shepherd, A., Chandler, F. S.
By L Bostock, A Shepherd, F S Chandler, Ewart Smith, Brian Bostock, Representative of Audrey Shepherd, Sue Chandler
By K. M. Vickers, M. J. Tipler, Vickers, K. M., Tipler, M. J.
By Sean McArdle, McArdle, Sean
By Open University Course Team
By OU Course Team