[1] UNIV MICHIGAN,DEPT ASTRON,ANN ARBOR,MI 48109
[2] UNIV ARIZONA,STEWARD OBSERV,TUCSON,AZ 85721
[3] AUSTRALIAN NATL UNIV,CANBERRA,ACT 2600,AUSTRALIA
[4] RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND
[5] UNIV SYDNEY,SCH ELECT ENGN,SYDNEY,NSW 2006,AUSTRALIA
[6] CALTECH,PALOMAR OBSERV,PASADENA,CA 91125
[7] HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138
[8] UNIV DURHAM,DEPT PHYS,DURHAM DH1 3LE,ENGLAND
[9] CSIRO,DIV RADIOPHYS,EPPING,NSW 2121,AUSTRALIA
[10] ANGLO AUSTRALIAN OBSERV,EPPING,NSW 2121,AUSTRALIA
[11] RUTGERS STATE UNIV,DEPT PHYS & ASTRON,PISCATAWAY,NJ 08854
[12] AUSTRALIAN NATL RADIO ASTRON OBSERV,PARKES,NSW 2870,AUSTRALIA