Dear Kristen,
 
It is quite likely that --
the collection of renga, which you mentioned, is _Renga: A Chain
of Poems by Octavio Paz, Jacques Roubaud, Edoardo Sanguineti
and Charles Tomlinson_ (Penguin, 1979). It was first published
in France by Editions Gallimard, 1971; with English translation
in the USA by George Braziller, 1972. Charles Tomlinson edited it.
 
Best wishes,
Yoshiko Kita
 
>And one more question, I have been looking for a collection of
>renga,the product of a multilingual experiment between Octavio
>Paz and some others.  Does anyone know where I might find it?
>
>Thanks,
>Kristen