1. Lucille A. Carver Mississippi Riverside Environmental Research Station, IIHR-Hydroscience & Engineering; Univ. of Iowa; 3388 Highway 22 Muscatine IA 52761
2. School of Public and Environmental Affairs, Indiana Univ.; 1315 Tenth St. Bloomington IN 47405
3. Dep. of Earth & Environmental Sciences; Univ. of Iowa; 121 Trowbridge Hall Iowa City IA 52242
4. School of Natural Resources, Univ. of Nebraska-Lincoln; 412 Hardin Hall Lincoln NE 68583
5. Dep. of Geography; Univ. of North Carolina; 327 Saunders Hall Chapel Hill NC 27599
6. Dep. of Civil & Environmental Engineering; Univ. of Iowa; 4111 Seamans Center Iowa City IA 52242
7. Dep. of Chemistry; Coe College; 1220 1st Ave. NE Cedar Rapids IA 52402