1. Research Associate, Water and Environmental Research Center, Univ. of Alaska Fairbanks, Box 755860, Fairbanks, AK 99775-5860.
2. Research Assistant Professor, Water and Environmental Research Center, Univ. of Alaska Fairbanks, Box 755860, Fairbanks, AK 99775-5860.
3. Director, Institute of Northern Engineering, Univ. of Alaska Fairbanks, Box 755860, Fairbanks, AK 99775-5860.
4. Associate Professor, Water and Environmental Research Center, Univ. of Alaska Fairbanks, Box 755900, Fairbanks, AK 99775-5900.