TY - GEN T1 - On the central ionizing star of G23.96+0.15 and near-IR spectral classification of O stars T2 - arXiv PY - 2008/10/20 AU - Crowther PA AU - Furness JP ED - DO - DOI: 10.48550/arxiv.0810.3520 Y2 - 2025/11/06 ER -