By Omer-Cooper, J.D., etc., Afigbo, A.E.
By Boyle, Trudy, Ray, Rita
By Scottish Primary Mathematics Group, Matthews, Bethan, etc.
By Ngugi wa Thiong'o
By Osborne, Gareth
By Broadbent, Paul, Church, K.
By Broadbent, Paul, Church, K., Chur
By Reeves, Leanda, Halksworth, Vivien
By Balkham, Keith, Mills, Richard
By Dransfield, Robert, Needham, David
By Myddelton, D. R., Barker, Richard
By Scottish Primary Mathematics Group
By Blake, WILLIAM, Bateson, F. W.
By Fournier, Isabelle
By Davidson, Basil, Bauh, F.K.
By Rawson, D.H., Rawcliffe, C.T.
By Gill, Stephen, Law, David
By Barratt, Margaret
By Barlow, Steve, Skidmore
By Bradfield, Philip
By Jones, Rhodri