I have a great CD called Carry It On -- Songs of America's working people with Pete Seeger, Jane Sapp & Si Kahn
Bread and Roses is the 4th song and the credits read (M.Farina-J.Openheim/Farina Music) I suspect "M. Farina & Farina Music might be a good place to start.
BMI at http://www.bmi.com/repertoire/database.html turned up a half dozen songs or versions with the name bread & roses. It also turned up one M.Farina a Mauro.
Ascap didnt return anything on "Bread and Roses".
Hope thats of some help!
Bo