TY  - BOOK
AU  - Chowdhry, Narendra Kumar
TI  - Elementary education and arithmetic : counting systems and numericals through the ages
SN  - 978-81-7541-550-8
U1  - 372.72 23rd.
PY  - 2010///
CY  - New Delhi
PB  - Shipra Publications
KW  - Arithmetics-Study and teaching (Elementary)
UR  - www.shiprapublications
ER  -