TY - GEN T1 - New Methods for Determining the Ages of PMS Stars T2 - arXiv PY - 2009/09/09 AU - Naylor T AU - Mayne NJ AU - Jeffries RD AU - Littlefair SP AU - Saunders ES ED - DO - DOI: 10.48550/arxiv.0909.1746 Y2 - 2025/11/19 ER -