Johnson E. R.; Low C. H. (1967). „Further spectral observations of grenade glow clouds in the lower thermosphere“. Australian Journal of Physics. 20 (5): 577. Bibcode:1967AuJPh..20..577J. doi:10.1071/ph670577.
Johnson E. R.; Low C. H. (1967). „Further spectral observations of grenade glow clouds in the lower thermosphere“. Australian Journal of Physics. 20 (5): 577. Bibcode:1967AuJPh..20..577J. doi:10.1071/ph670577.