[texhax] Using eurm10 font chart

[Rodolfo Medina]

Hi to all (La)TeX users.

I need some greek letters that I see in the file amsndoc.dvi (p.38 for me),
under the eurm10 family.

I use plain TeX.

I put:

 \newfam\eurmfam
 \font\teneurm=eurm10
 \textfont\eurmfam=\teneurm
 \def\bb{\fam\eurmfam\teneurm}

, and it works if I do:

$$\bb A$$

; but, if I do:

$$\bb \varphi$$

, it does not work.  What is the best way to solve this?

Thanks for any help
Rodolfo