ideas on printing spec. chars. from HTML file to Samsung ML-1210 printer?

[lan4pal at newcomb.mv.com]

I am working on mathematics lesson plans in HTML, with many
non-Latin characters such as Greek (e.g., π) and math
specifics (e.g., ∀, ∠).  Only "mu" would come out.
Only about a dozen of the math operators print out.  In a quick
test, I put my Greek char. file into an OOo 1.9.125 .odt file;
the printout gave me all but 9 of the characters (thought
lower-case alpha would came, but an assumption...).

My system is running Fedora core 4 with Samsung ML-1210 laser
printer.  "gdi" is the printer's "recommended driver".

For the moment, I can reboot into MS2000 to print these pages,
but would rather save time and stay in Linux.

Any ideas what I'm missing here?

The 2 files mentioned above are on the web at:
    http://www.mv.com/ipusers/newcomb/HBpage2.print.htm
    http://www.mv.com/ipusers/newcomb/GreekAlphabet.odt

Thanks, Lee A. N.