1. Penn State Univ.University ParkPA16802
2. ISRIC—World Soil InformationWageningenThe Netherlands
3. USGSSouthwest Biological Science CenterMoabUT84532
4. New Mexico State Univ.Las CrucesNM88003
5. West Virginia Univ.— GRUMorgantownWV26506
6. NRCSLincolnNE68508
7. West Virginia Univ.MorgantownWV26506