1. Univ. of Maryland; Center for Environmental Science, Appalachian Laboratory; 301 Braddock Road Frostburg MD 21532
2. Florida State Univ.; Earth, Ocean & Atmospheric Science; 403 Oceanography Building Tallahassee FL 32306
3. Kansas State Univ.; Dep. of Agronomy, 2004 Throckmorton Plant Sciences Center; Manhattan KS 66506-5501
4. Purdue Univ.; Dep. of Forestry and Natural Resources; 195 Marsteller St. West Lafayette IN 47907