New HST Observations of the Wolf-Rayet Shell Nebula NGC 6888 Dufour, R. ; Moore, B. ; Hester, J. ; Scowen, P. ; Buckalew, B. Abstract Publication: Revista Mexicana de Astronomia y Astrofisica Conference Series Pub Date: September 2003 Bibcode: 2003RMxAC..18R.146D