I'll bet you didn't know that Tonio has cowritten no fewer than 11 songs with legendary pop composer Burt Bacharach. Well, it's true, according to this site. Here are the titles:
Change My Mind
Count On Me
In My Dreams
Leave It To The Girls
Love Comes Back
Love's Still The Answer
Never Take That Chance Again
Paint It Blue
Tell It To Your Heart
When You Lose Somebody
Where Does Love Go

Ronald Isley recorded two of these, and Burt himself released one of them as a single. Don't know about the rest, but they'll probably turn up somewhere eventually. A twelfth song, "Someday," was recorded by Swedish pop star Carola.