[1] DEPT ASTROPHYS,OXFORD OX1 3RQ,ENGLAND
[2] US DEPT TERR MAGNETISM,WASHINGTON,DC 20015
[3] MINIST CIENCIA TECHNOL,INST PESQUISAS ESPACIAIS,SAO JOSE DOS CAMPOS,SP,BRAZIL
[4] ARIZONA STATE UNIV,DEPT PHYS,TEMPE,AZ 85287
[5] DOMINION ASTROPHYS OBSERV,VICTORIA V8X 4M6,BC,CANADA
[6] MIT,DEPT PHYS,CAMBRIDGE,MA 02139
[7] UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720
[8] DARTMOUTH COLL,DEPT PHYS & ASTRON,HANOVER,NH 03755
[9] UNIV CHILE,DEPT ASTRON,SANTIAGO,CHILE
[10] LOUISIANA STATE UNIV,DEPT PHYS & ASTRON,BATON ROUGE,LA 70803
[11] HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138
[12] INDIANA UNIV,DEPT ASTRON,BLOOMINGTON,IN 47405
[13] MICHIGAN STATE UNIV,DEPT PHYS & ASTRON,E LANSING,MI 48824
[14] WASHINGTON STATE UNIV,PROGRAM ASTRON,PULLMAN,WA 99164
[15] UNIV HAWAII,INST ASTRON,HONOLULU,HI 96822
[16] CARNEGIE INST WASHINGTON,MT WILSON OBSERV,PASADENA,CA 91101
[17] CARNEGIE INST WASHINGTON,LAS CAMPANAS OBSERV,PASADENA,CA 91101