Four-color and Hbeta photometry for the bright B8 and B9 type stars north of declination -10 . Crawford, D. L. ; Barnes, J. V. ; Golson, J. C. ; Hube, D. P. Abstract Publication: The Astronomical Journal Pub Date: October 1973 DOI: 10.1086/111477 Bibcode: 1973AJ.....78..738C