1. U.S. Geological Survey, Hydrologic Instrumentation Facility, Stennis Space Center, MS 39529.
2. Int. Joint Commission, Ottawa ON, Canada, K1P 6K6.
3. State Hydrological Institute, St. Petersburg, 199053, Russian Federation.
4. Environment Canada, Water Survey of Canada, Ottawa ON, Canada K1A 0H3.
5. World Meteorological Organization, Hydrology and Water Resources Dept., CH-1211 Geneva 2, Switzerland.