Weibel, D., Schelling, E., Bonfoh, B., Utzinger, J., Hattendorf, J., Abdoulaye, M., Madjiade, T. and Zinsstag, J. 2008. Demographic and health surveillance of mobile pastoralists in Chad: integration of biometric fingerprint identification into a geographical information system. Geospatial Health. 3, 1 (Nov. 2008), 113–124. DOI:https://doi.org/10.4081/gh.2008.237.