By Anderson, Margaret Elspeth
By Murdoch, E.B.
By Geldard, Richard G.
By Worsdall, Frank
By Blair, Anna
By Stevenson, Robert Louis, Calder, Jenni
By Schwarz, Catherine
By Davidson, George W., etc.
By Chambers
By Walker, Peter M.B.
By Walker, Peter, Walker, P. M. B, Walker, Peter M.B.
By Munro, David
By Escott Lynn
By Allen, Robert
By .
By Lexus
By Derbyshire, Ian, J.Denis
By Watson, Richard
By Willey, Russ
By Bourne, J.D.
By Clark, John O. E.
By Nuffield Mathematics Project
By Forbes, Patricia, Smith, M.Holland
By Unknown
By Mansion, J.E., Ledesert, D.M., R.P.L.