[SATLUG] stringing three song files together with sox

[N. David Guarneri]

Does anyone know how to turn three songs into one song using sox? 
Someone here at work is doing a presentation and needs to do this.  I
have plenty of music tools at home (sony soundforge comes to mind) but
they need this today.  Thanks!

-- 
"I never Metacharacter I didn't like."  -- Dougherty and Robbins, _Sed
and Awk_ 2nd Ed (1997).