TY - JOUR AU - N. Morrison AU - Peter Conti BT - The Astrophysical Journal DA - Jan-09-1978 DO - 10.1086/156403 PY - 1978 EP - 558 T2 - The Astrophysical Journal TI - Spectroscopic studies of O-type binaries. IV - HD 165052 and HD 167771 UR - http://articles.adsabs.harvard.edu/full/1978ApJ...224..558M VL - 224 SN - 0004-637X ER -