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The On 14 April 1951, '''Southern Railway''' became the first zone of Indian Railways (IR), formed on 14 April 1951 from the merger of the [[Madras and Southern Mahratta Railway|Madras and Southern Mahratta]], the [[South Indian Railway|South Indian]] and the [[Mysore State Railway|Mysore State Railways]]. In 1966, parts of SR were combined with portions of [[Central Railway]]to form the ninth zone of IR, [[South Central Railway]].  == External links == *[http://en.wikipedia.org/wiki/Southern_Railway_(India) "Southern Railway (India)"] ''Wikipedia''. *Indian Railways, [http://www.indianrailways.gov.in/financecode/ADMIN_FINANCE/AdminFinanceCh1.htm "Evolution of Indian Railways - Historical Background"] ''Indian Railway Administration and Finance''.