By David Baker, etc., Jim Griffith, Paul Hogan, Chris Humble
By Somerset County Council
By Michael White, David Rayner
By Michael White
By Mr David Alcorn, Mr Tony Banks
By Henry Pluckrose, Chris Fairclough
By Beryl Webber, Terry Barnes
By Gunter Schymkiw
By WLE
By Collins GCSE
By Mark Patmore, Eddie Wilde, Jean Matthews, Howard Baxter, John Jeskins
By Yvonne Gostling, Bob Hartman, Howard Johnson, Jean Matthews, Michael Handbury
By Lucy Simonds, Jo Chambers
By Jo Chambers, Paul Broadbent
By Fiehn, Terry
By M. R. Heylings
By J. W. Adams, R. P. Beaumont, T. R. Goddard
By Kevin Evans
By Unidentified Author, School Mathematics Project
By Howard Baxter et. al, Mike Handbury, John Jeskins, Jean Matthews, Howard Baxter, Eddie Wilde
By Clemson, David, Clemenson, Wendy, Clemson, Wendy, Wendy Clemson, David Clemson