There is a video of Bartok's Romanian Folk Dances, all six, at youtube.

You're thinking of the ones he published as arrangements (violin/piano etc). What I was talking about was the posthumously published 5-volume collection "Rumanian Folk Music" (Indiana University, 1969), which contains hundreds of tunes. It's about the size of Bronson.

I've only seen it in Edinburgh University Library but many institutions must have copies.