ISBN 9781272784799 books & textbook
On the General Spectra of Certain Type-Stars and the Spectra of Several of the Brighter Stars in the Green Region...
Lockyer, Norman Solar Physics Committee (Great Britain)
Nabu Press /2012-01-20 Paperback / 56 Pages
isbn-10: 1272784797 / isbn-13: 9781272784799
