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    • Balmer line photometry of the 30 doradus nebula 

      Strauss, Federico Maximo; Braz, M.A.; Ducati, Jorge Ricardo (1979) [Journal article]
      The 30 Doradus nebula was scanned at 29 strips of constant declination with a square diaphragm of 30" x 30" using Hα and Hβ interference filters. The absolute flux calibration was obtained from observations of six planetary ...