I have created a child theme for Oxygen. I have been having trouble changing the font on some elements so I used Firefox's plugin Firebug to try to locate the issue. Below are the results. I've been trying to change fonts to "Times" for testing purposes. Firebug does not tell me what file this style is coming from. I've looked in the parent theme style.css but I do not see the font that I can't get rid of: "Abel". I even changed the name of the parent style.css to style.txt to eliminate that file.
Firefox Firebug plugin says the style is coming from
/testsite/ #2 (line 58)
Screen Shot of Firebug