Corrigendum to "Effect of Na-doping on structural, electrical, and magnetoresistive properties of La0.7(Ag0.3-xNax)MnO3 polycrystalline ceramics" [Ceram. Int. 46 (2020) 584–591]. Issue 3 (1st February 2021) - Zhang, Shuai; Dong, Gang; Liu, Yang; Li, Hongjiang; Chu, Kaili; Pu, Xingrui; Yu, Xiaohan; Liu, Xiang