The Dominion Astrophysical Observatory, Victoria, B.C. :
McKellar, A.
The Dominion Astrophysical Observatory, Victoria, B.C. : the Chromospheric K-Line of CA II in the spectrum of 31 Cygni / A. McKellar ; L. H. Aller, G. J. Odgers and E. H. Rivhardson. - Ottawa : The Queen's Printer and Controller of Stationary, 1959. - 58 p. ; 29 cm.
Dominion Astrophysical Observatory.
SPE-B 06107
The Dominion Astrophysical Observatory, Victoria, B.C. : the Chromospheric K-Line of CA II in the spectrum of 31 Cygni / A. McKellar ; L. H. Aller, G. J. Odgers and E. H. Rivhardson. - Ottawa : The Queen's Printer and Controller of Stationary, 1959. - 58 p. ; 29 cm.
Dominion Astrophysical Observatory.
SPE-B 06107