[1] UNIV MICHIGAN,DEPT ASTRON,ANN ARBOR,MI 48109
[2] UNIV EDINBURGH,DEPT ASTRON,EDINBURGH EH9 3JH,MIDLOTHIAN,SCOTLAND
[3] WESTERN KENTUCKY UNIV,DEPT ASTRON & ASTROPHYS,BOWLING GREEN,KY 42101
[4] NAGOYA UNIV,DEPT PHYSIOL & BIOCHEM,CHIKUSA KU,NAGOYA,AICHI 464,JAPAN
[5] RIKKYO UNIV,DEPT PHYS,TOKYO 171,JAPAN
[6] UTSUNOMIYA UNIV,FAC EDUC,UTSUNOMIYA,TOCHIGI 321,JAPAN
[7] UNIV TOKYO,TOKYO ASTRON OBSERV,MITAKA,TOKYO 181,JAPAN
[8] NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771
[9] INDIANA UNIV,DEPT ASTRON,BLOOMINGTON,IN 47401
[10] KYOTO UNIV,DEPT PHYS,KYOTO 606,JAPAN
[11] ROYAL OBSERV,EDINBURGH EH9 3HJ,MIDLOTHIAN,SCOTLAND
[12] UNIV TOKYO,DEPT ASTRON,ANAT 2,TOKYO 113,JAPAN
[13] MIT,CTR SPACE RES,CAMBRIDGE,MA 02139
[14] UNIV ARIZONA,LUNAR & PLANETARY LAB,TUCSON,AZ 85721
[15] RADIO RES LAB,KOGANEI,TOKYO 184,JAPAN
[16] UNIV TOKYO,TOKYO ASTRON OBSERV,NOBEYAMA RADIO OBSERV,MINAMISA KU,NAGANO 38413,JAPAN