Photometric observations of weak-line T Tauri stars - II. in Taurus-Auriga, Orion and ScorpiusC. Chavarría-K, L. Terranegra, M. A. Moreno-Corral and E. de LaraAstron. Astrophys. Suppl. Ser., 145 2 (2000) 187-195DOI: https://doi.org/10.1051/aas:2000350