TY - JOUR AU - P. Massey AU - Peter Conti BT - The Astrophysical Journal DA - Jan-12-1977 DO - 10.1086/155696 PY - 1977 EP - 431 T2 - The Astrophysical Journal TI - Spectroscopic studies of O-type binaries. III - HDE 228766: an evolved Of system UR - http://articles.adsabs.harvard.edu/full/1977ApJ...218..431M VL - 218 SN - 0004-637X ER -