Corrigendum to "Influence of Na doping on the magnetic properties of LaFeO3 powders and dielectric properties of LaFeO3 ceramics prepared by citric sol-gel method" [Ceram. Int. 43 (2017) 7922–7928]. Issue 18 (15th December 2017) - Cao, Ensi; Qin, Yanrong; Cui, Tingting; Sun, Li; Hao, Wentao; Zhang, Yongjia