Open University Course Team. (1975). Counting I and II: Primitive and more developed counting systems by B L Vander Waerden and Graham Flegg. Open uty press.
Chicago Edition CitationOpen University Course Team. Counting I and II: Primitive and More Developed Counting Systems by B L Vander Waerden and Graham Flegg. Open uty press, 1975.
MLA Edition CitationOpen University Course Team. Counting I and II: Primitive and More Developed Counting Systems by B L Vander Waerden and Graham Flegg. Open uty press, 1975.
Warning: These citations may not always be 100% accurate.