00503cam a22002051 4500 sa 66005909 DLC 20260227112252.0 750313s1966 xx 000 0 eng sa 66005909 (OCoLC)1215120 DLC OTU DLC premarc QA248 .N3 Narayan, Shanti. Number systems. Delhi, S. Chang, 1966. viii, 128 p. 22 cm. Arithmetic Foundations. 70200 70200