[CentOS] X11 fonts question

I'm having trouble figuring out which RPM would contain X11 fonts that
go by names containing:

"-courier-medium-r-*-18-"
"-courier-bold-r-*-18-"
"-courier-medium-o-*-18-"

in sizes 18 (shown), 14, and 12.

so far I can't figure it out.

I've looked at the contents of all the xorg-x11-fonts-* packages that
"yum list available | grep xorg-x11-fonts" lists. The best I've come
up with is a bunch that contain files named "*-courXXXX-*" followed by some
uppercase characters whose meaning I don't know (where I show "XXXX" above).

Since I seem to be fairly clueless on this topic, I'd welcome any
useful advice that any of you can give.

thanks!

-- 
---- Fred Smith -- fredex at fcshome.stoneham.ma.us -----------------------------
               Show me your ways, O LORD, teach me your paths;
                     Guide me in your truth and teach me,
                         for you are God my Savior,
                    And my hope is in you all day long.
-------------------------- Psalm 25:4-5 (NIV) --------------------------------