@article{article, title = {{Observations of the atmospheres and winds of O-stars, LBVs and Wolf-Rayet stars}}, publisher = {{Springer Science and Business Media LLC}}, url = {{}}, year = {{1993}}, month = {{3}}, author = {{Crowther PA and Willis AJ}}, doi = {{10.1007/bf00771051}}, volume = {{66}}, journal = {{Space Science Reviews}}, issue = {{1-4}}, pages = {{85-103}}, note = {{Accessed on 2025/05/20}}}