1. Cornell International Institute for Food, Agriculture and Development, Cornell University; B75 Mann Library Ithaca NY 14853
2. Smithsonian Environmental Research Center; 647 Contees Wharf Rd. Edgewater MD 21037
3. Section of Soil and Crop Sciences, School of Integrative Plant Science; Cornell University; 1017 Bradfield Hall, 306 Tower Rd. Ithaca NY 14853