The Continuous Spectra of Certain Planetary Nebulæ A Photometric Study. T. L. Page in Mon. Notices Royal Astron. Soc. 96:604 (1936).  What the paper says!?
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This is the paper that first observed continuous spectra from planetary nebulae in the visible range (first continuous-spectra from reflection nebulae were by Slipher[1]) and as due to the two-photon mechanism, although the origin remained uncertain until the work of Spitzer and Greenstein.[2]

References

  1. ↑ On the spectrum of the nebula in the Pleiades. V. M. Slipher in Low. Obs. Bull. 2:26 (1912).
  2. ↑ Template:Spitzer54a
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