Low-Dispersion Image Tube Spectra in the Red: 3C, 33, 48, Ton 256, and an Infrared Star. Ford, W. Kent, Jr. ; Rubin, Vera C. Abstract Publication: The Astrophysical Journal Pub Date: October 1965 DOI: 10.1086/148414 Bibcode: 1965ApJ...142.1303F