| Affiliation: |
| AA(Harvard-Smithsonian Center for Astrophysics, Mail Stop 51, 60 Garden Street, Cambridge, MA 02138.; Hubble Fellow.; Current address: Department of Physics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139.), AB(Astronomy Department, Mount Holyoke College, 50 College Street, South Hadley, MA 01075.; Five College Astronomy Department, University of Massachusetts, Amherst, MA 01003.), AC(Van Vleck Observatory, Wesleyan University, Middletown, CT 06459.), AD(Department of Astronomy, Mail Code 3411, University of California, Berkeley, CA 94720.), AE(Harvard-Smithsonian Center for Astrophysics, Mail Stop 51, 60 Garden Street, Cambridge, MA 02138.), AF(Department of Astronomy, Mail Code 3411, University of California, Berkeley, CA 94720.), AG(NASA Goddard Space Flight Center, Greenbelt, MD 20771.) |