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Narayanan S. C. K., . (2015). Survey on service quality BSNL Calicut. Mangalore: Kiran Coth.
Narayanan Shino Coth Kiran, . 2015. Survey on service quality BSNL Calicut. Mangalore: Kiran Coth.
Narayanan Shino Coth Kiran, . Survey on service quality BSNL Calicut. Mangalore: Kiran Coth. 2015.