00370nam a2200121Ia 4500082001900000100004300019245003300062260002500095300002300120490007400143500000500217700002600222  a530.1bH894.AT  aHughston, L. P. and Ward, R. S. d ed.  aAdvances in twistor theoryb  aLondonbPitmanc1979  a335p. Index, Bibl.  aResearch notes in Mathematicsv 37 sub-series in Mathematical Physics  a  aWard, R. S. ; jt. ed.