1. Ames Research Center, Moffett Field, CA
2. Cornell University, Ithaca, NY
3. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA
4. Pennsylvania State University, State College, PA
5. University of California, Santa Cruz, CA
6. University of Arizona, Tucson, AZ
7. Observatoire de Paris, Meudon, France
8. Institute for Advanced Study, Princeton, NJ