Gee, I had a long treatise typed out, and I clicked the wrong thing and lost it. I may get around to posting it again later. In short, the two big publishers of "folk mass" music were FEL Publications (Friends of the English Liturgy, in Chicago) in the 1960s, and NALR (North American Liturgy Resources of Phoenix) in the 1970s.

Napster has a "folk mass playlist:

http://us.napster.com/blog/post/60s-catholic-folk-mass

Here's one at YouTube:

https://www.youtube.com/playlist?list=PLYo0NzeSeTi8bG04d-wjp277usUUGwm6U

Also try http://www.folkmass.us/

Ken Canedo, who's a pretty good composer of current Catholic church music, has a Folk Mass page on his website:

http://www.kencanedo.com/folk_mass_composers.html

Gee, I remember all the words to most of these songs! Hope that helps.


-Joe-