NGC 6326 - Hubble Space Telescope - Hajian, Balick, Terzian, Panagia, Bond (OIII, [NII], linear V)
NGC 6326 - Schwarz, H.E., Corradi R.L.M., Melnick. J 1992 A&A Suppl, 96, 23 (RGB, Halpha, [NII], [OIII])