| Affiliation: |
| AA(New Mexico Institute of Mining and Technology, Physics Department, Socorro, NM.; National Radio Astronomy Observatory, Socorro, NM.), AB(New Mexico Institute of Mining and Technology, Physics Department, Socorro, NM.; National Radio Astronomy Observatory, Socorro, NM.), AC(Department of Astronomy, University of Wisconsin, Madison, WI.), AD(Max-Planck-Institut für Astronomie, Heidelberg, Germany.), AE(Centro de Radioastronomía y Astrofísica, UNAM, Morelia, Michoacán, Mexico.), AF(Istituto di Radioastronomia, INAF, Sezione di Firenze, Florence, Italy.; University of Puerto Rico at Rio Piedras, Physics Department, San Juan, PR.), AG(Manchester College, North Manchester, IN.), AH(Department of Astronomy, University of Wisconsin, Madison, WI.) |