TY - JOUR
AU - N. Walborn
AU - Edward Fitzpatrick
BT - Publications of the Astronomical Society of the Pacific
DA - Jan-12-1990
DO - 10.1086/132646
PY - 1990
EP - 379
T2 - Publications of the Astronomical Society of the Pacific
TI - Contemporary optical spectral classification of the OB stars - A digital atlas
UR - http://articles.adsabs.harvard.edu/full/1990PASP..102..379W
VL - 102
SN - 0004-6280
ER -