TY - CONF AU - H. Yang AU - Jeffrey Linsky AU - K. France AU - Christopher Johns-Krull AU - Matthew Browning AU - Andrew West DA - 2011-12 PY - 2011 EP - 69 TI - HST/COS Spectra of DF Tau and V4046 Sgr: First Detection of Molecular Hydrogen Absorption Against the Lyman alpha Emission Line VL - 448 ER -