TY - JOUR
AU - B. Bohannan
AU - Peter Conti
BT - The Astrophysical Journal
DA - Jan-02-1976
DO - 10.1086/154227
PY - 1976
EP - 797
T2 - The Astrophysical Journal
TI - Spectroscopic studies of O-type binaries.1 BD +40 4220 : an enigma ripe for resolution.
UR - http://adsabs.harvard.edu/full/1976ApJ...204..797B
VL - 204
SN - 0004-637X
ER -