Open University Course Team. (1975). Counting I and II: Decimal number words;tallies and knots by B L Van der Waerden and Graham Flegg. Open uty press.
Chicago Edition CitationOpen University Course Team. Counting I and II: Decimal Number Words;tallies and Knots by B L Van Der Waerden and Graham Flegg. Open uty press, 1975.
MLA Edition CitationOpen University Course Team. Counting I and II: Decimal Number Words;tallies and Knots by B L Van Der Waerden and Graham Flegg. Open uty press, 1975.
Warning: These citations may not always be 100% accurate.