Vennes, StephaneThorstensen, John RPolomski, Elisha2015-12-132015-12-130004-637Xhttp://hdl.handle.net/1885/91744We determine the mass functions and mass ratios for three close white dwarf plus red dwarf binaries (EUVE J0720-317, 1016-053, and 2013+400). Hubble Space Telescope Goddard High-Resolution Spectrograph spectra of the He IV λ1640 and C IV λ1550 spectralKeywords: Binaries: close; Stars: abundances; Ultraviolet: stars; White dwarfs19992015-12-12