KILLINGBECK, K.P. — The Creative Use of Calculators.

Harmondsworth: Penguin. 1981. 1st ed. "Playing about with numbers has always been a way to develop an interest in mathematics and modern pocket calculators, by freeing you from the chore of 'sums', give unprecedented scope for this".Pp 220, slight toning to pages. P/b. Illustrated cover. G+.