United States. Environmental Protection Agency. Office of Water
P. M. Huck
Staff-Minerals Research.
Alberta. Water Quality Branch.
Unknown Author
Municipal Industrial Strategy for Abatement Program (Ontario)
T. L Pollock
B. W. Wiskel
Intergovernmental Working Group on the Mineral Industry. Sub-Committee on Mine Waste.
Canada. Water Pollution Control Directorate.
Peter J. A. Fowlie