Suwannatrai, A., K. Suwannatrai, S. Haruay, S. Piratae, C. Thammasiri, P. Khampoosa, J. Kulsantiwong, S. Prasopdee, P. Tarbsripair, R. Suwanwerakamtorn, S. Sukchan, T. Boonmars, J. B. Malone, M. T. Kearney, and S. Tesana. “Effect of Soil Surface Salt on the Density and Distribution of the Snail Bithynia Siamensis Goniomphalos in Northeast Thailand”. Geospatial Health, vol. 5, no. 2, May 2011, pp. 183-90, doi:10.4081/gh.2011.170.