arXiv:1105.4757 [astro-ph.SR]AbstractReferencesReviewsResources Classifications Subjects Themes Keywords spectral classification, exhibiting lower ionization spectral, ionization spectral features plus hbeta, spectral features plus hbeta emission, lower ionization spectral features plus Tags journal article Journal Information Publisher Journal Year Month Volume Number Pages DOI URL Miscellaneous Typesetting Pages Language License Submit Reset