Pulsars. Duthie, J. G. M. ; Sturch, C. R. ; Richer, H. B. ; Rodney, P. ; Taylor, J. H. ; Huguenin, G. R. ; Lovelace, R. V. E. ; Sutton, J. M. Abstract Publication: International Astronomical Union Circular Pub Date: 1969 Bibcode: 1969IAUC.2135....2D