You can't do a lot of reading or research about collage with coming across this man's name. I have had the opportunity to speak with him on the phone, and found him to be a very caring and helpful man. He has crossed many peoples' paths in classes, museums and through the world wide web.
He has come up with a fascinating collage technique that many artists employ in their work. His site is informative, and a treasure trove of info. Go there and check it out!