Alamelu, K. Number World : primary School Mathematics-Primer B / K. Alamelu and illustraded by Makhan Lal Saha - rep. - Kolkata,India : Orient BlackSwan ; 2010 - 113p. : 24cm. Subjects--Topical Terms: --sciences and mathematics--mathematics Dewey Class. No.: 516.36 / AlN 2010 c1