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Anurag Kumar Srivastava, Shakti Ranjan Mohapatra, Manit Mishra 2023. Analysis of Various Customer based Services Rendered by the Mobile Phone Service Providers. European Economic Letters (EEL). 13, 1 (Mar. 2023), 61–65. DOI:https://doi.org/10.52783/eel.v13i1.119.