By Tony Woodman, David West
By Schmidt-Nielsen, Knut
By Oliver, Roland, Fagan, Brian M.
By Corfe, Tom
By Boyd, Anne
By Zwiebach, Burton
By Knowles, David
By F. W. Rawding
By Tennison, B. R.
By Pratt, Cranford
By Virgil, Craddock, C. H.
By Barro, Robert J., Grossman, Herschel I.
By Broome/Chesters
By Broome, Peter
By Andrews, Ian
By Niall Rudd
By Lass, Roger
By Michael Swan, Swan, Michael
By Milton, John, Potter, Lois, Broadbent, John
By School Mathematics Project
By Ronald Barnes
By Tribe, Michael A., Tallan, Irwin, Eraut, Michael R.
By Hornby, William F., Jones, Melvyn
By Feinstein, Charles H.
By Ratcliffe, Derek A.