Lewis, K., & Lewis, P. K. (2016). Tobacco smoke exposure in early life: The first African cohort studies. The International Journal of Tuberculosis and Lung Disease, 20(6), p. 711. doi:10.5588/ijtld.16.0260

Lewis, Keir, and Professor Keir Lewis. "Tobacco Smoke Exposure in Early Life: The First African Cohort Studies." The International Journal of Tuberculosis and Lung Disease 20, no. 6 (2016): 711.

Lewis, Keir, and Professor Keir Lewis. "Tobacco Smoke Exposure in Early Life: The First African Cohort Studies." The International Journal of Tuberculosis and Lung Disease 20.6 (2016): 711.