Popkin, B.

Vanderslice, J., Popkin, B. & Briscoe, J., 1994. Drinking-water quality, sanitation, and breastfeeding : their interactive effects on infant health. , pp.p. 589-601 : 4 fig., 7 tab. Available at: https://es.ircwash.org/sites/default/files/Vanderslice-1994-Drinking.pdf.