@techreport{NBERw13838,
 title = "The Cognitive Link Between Geography and Development: Iodine Deficiency and Schooling Attainment in Tanzania",
 author = "Erica M. Field and Omar Robles and Máximo Torero",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "13838",
 year = "2008",
 month = "March",
 URL = "http://www.nber.org/papers/w13838",
}