372.72/CHO/E 33466 33467 33468 33469 33470

Chowdhry, Narendra Kumar          Elementary Education and Arithmetic : Counting Systems and Numerals Through the Ages / Narendra Kumar Chowdhry . – New Delhi : Shipra Publications, 2010         69 p.         ISBN9788175415508 : 80/-         1. Education         1. Arithmetic – Study and teaching (Elementary)