1. School of Environment and Natural Resources The Ohio State University; The Ohio Agricultural Research and Development Center; Wooster OH 44691
2. Department of Crop and Soil Sciences; Pennsylvania State University; University Park PA 16802
3. School of Environmental and Municipal Engineering Xi'an Univ. of Architecture and Technology; Xi'an Shaanxi China
4. Key Lab. of Advanced Civil Eng. Materials; Tongji University; Shanghai China
5. Carmeuse Technology Center; Pittsburgh PA 15225