By David M. Smith
By Bill Forsyth, Andrew Bethell
By Ernest N. McCarus Edited by Peter F. Abboud
By J. E. Dodd
By Leslie F. Musk, Musk, Leslie F.
By Malcolm E. Rose, R. A. W. Johnstone
By Stewart/Tall, Ian Stewart, David Tall
By School Mathematics Project
By Timothy P. Bayliss-Smith, Bayliss-Smith, Timothy P.
By George Boolos, Richard C. Jeffrey, Boolos, George, Jeffrey, Richard C.
By Ann Walker, Walker, Ann
By Dixon
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