Cook, J., Sur, D., Clemens, J. and Whittington, D. 2010. Evaluating Investments in Typhoid Vaccines in Two Slums in Kolkata, India. Journal of Health, Population and Nutrition. 27, 6 (Feb. 2010), 711–724. DOI:https://doi.org/10.3329/jhpn.v27i6.4319.