Sister cities

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Kolkata has several sister cities:

A good reference previously used in Kolkata

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Sinha, P. (1990). "Kolkata and the currents of history". In Chaudhuri S. (ed.) (ed.). Kolkata: the living city. Volume 1: The Past. Oxford University Press, Oxford. {{cite book}}: |editor= has generic name (help)
Cited by: Heierstad, G. (2003). "Nandikar: staging globalisation in Kolkata and abroad" (PDF). University of Oslo, Norway. p. 102. Retrieved 26 April 2006.

West Bengal geography etc

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[1]

Good source for WB especially health: http://mohfw.nic.in/NRHM/State%20Files/wb.htm#sp