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Nigam, H.K. 2011. Degree of approximation of a function belonging to weighted $(L_r ,\xi(t ))$ class by (C,1)(E,q) means. Tamkang Journal of Mathematics. 42, 1 (Mar. 2011), 31-37. DOI:https://doi.org/10.5556/j.tkjm.42.2011.514.