1. US Geological SurveyColumbia Environmental Research CenterColumbiaMissouri
2. Office of Restoration and Damage AssessmentUS Department of the InteriorWashingtonDC
3. US Geological Survey, Columbia Environmental Research CenterJackson Field Research StationJacksonWyoming
4. Great EcologyDenverColorado
5. Woodard & CurranProvidenceRhode IslandUSA
6. Centre for Mined Land Rehabilitation, Sustainable Minerals InstituteThe University of QueenslandBrisbaneAustralia