S. N. Longmore (1 and 2), M. G. Burton (1), P. J. Barnes (3 and 1), T.
  Wong (1 and 2 and 5), C. R. Purcell (1 and 4), J. Ott (2 and 6) ((1) UNSW,
  (2) ATNF, (3) Uni. of Sydney, (4) Jodrell Bank Observatory, (5) Uni. of
  Illinois, (6) NRAO)