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Dyson, Tim and Das Gupta, Monica (2001) Demographic trends in Ludhiana district, Punjab, 1881-1981: an exploration of vital registration data in colonial India. In: Liu, Ts'ui-jung, Lee, James, Reher, David S., Saito, Osamu and Feng, Wang, (eds.) Asian Population History. International studies in demography. Oxford University Press, Oxford, pp. 79-104. ISBN 9780198294436
