1. Institut national de la recherche scientifique; Centre Eau, Terre et Environnement, Université du Québec; Québec City Québec, QC Canada
2. Geological Survey of Canada; Natural Resources Canada; Quebec City Quebec Canada
3. Canadian Geodetic Survey, SGB; Natural Resources Canada/Government of Canada; Ottawa Ontario Canada
4. Surveyor General Branch; Natural Resources Canada/Government of Canada; Ottawa Ontario Canada
5. Department of Geology; State University of New York at Buffalo; Buffalo New York USA
6. Universidad Autónoma del Estado de México; Centro Interamericano de Recursos del Agua, Carretera Toluca-Atlacomulco, km 14.5. Ciudad Universitaria; Toluca Estado de México Mexico