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Langford, Christopher (2005) Did the 1918-19 influenza pandemic originate in China? Population and Development Review, 31 (3). pp. 473-505. ISSN 0098-7921
Langford, Christopher (2004) Book review: the Spanish influenza pandemic of 1918–19: new perspectives. Population Studies, 58 (2). pp. 252-253. ISSN 0032-4728
Langford, Christopher (2002) The age pattern of mortality in the 1918-1919 influenza pandemic: an attempted explanation based on data for England and Wales. Medical History, 46 (1). pp. 1-20. ISSN 0025-7273
Langford, Christopher (2003) Cannan, Edwin. In: Demeny, Paul and McNicoll, Geoffrey, (eds.) Encyclopedia of Population. Macmillan Reference USA, New York, USA, pp. 112-113. ISBN 9780028656779
Langford, Christopher (2003) Glass, David. In: Demeny, Paul and McNicoll, Geoffrey, (eds.) Encyclopedia of Population. Macmillan Reference USA, New York, USA, pp. 467-468. ISBN 9780028656779
Langford, Christopher (2003) Kuczynski, R. R. In: Demeny, Paul and McNicoll, Geoffrey, (eds.) Encyclopedia of Population. Macmillan Reference USA, New York, USA, pp. 563-564. ISBN 9780028656779
Langford, Christopher (2002) Reasons for the decline in mortality in Sri Lanka immediately after the Second World War: a re-examination of the evidence. In: Athukorala, Premachandra, (ed.) The Economic Development of South Asia. Elgar Mini Series. Edward Elgar, Cheltenham, Uk, pp. 285-307. ISBN 9781840646955
Langford, Christopher (2001) Fertility decline in Sri Lanka: could fertility now be at about replacement level? In: Sathar, Zeba and Phillips, James, (eds.) Fertility Transition in South Asia. International studies in demography. Oxford University Press, Oxford, pp. 121-134. ISBN 9780199241859
Langford, Christopher (2001) Trends and fluctuations in fertility in Sri Lanka during the first half of the twentieth century. In: Liu, Ts'ui-jung, (ed.) Asian Population History. International studies in demography. Oxford University Press, Oxford, pp. 176-188. ISBN 9780198294436
