Counter-intelligence
Subtitle: the venerable bead
By: [by John Dodridge ; workcards compiled by Pat Hodder and Richard Winn].
Contributors: Hodder, Pat.; Winn, Richard.; Cheshire (England). Education Committee.
Publisher: Cheshire County Council
Published: 1986
Place of publication: Cheshire
Language: eng
Number of pages: 23
Subjects: Numeration -- History.; Mathematics -- Study and teaching.; Calculators.; Mathematical recreations.
Notes: Title from cover.

Includes bibliographical references.