Bartók's original field recordings for the Romanian Folk Dances. I just did my Master Research on the piece and it was hard to find them. I thought it might be useful for others to have access to them. The sound quality is very bad but come on, these are more than 100 year old recordings, made with Edison's phonograph. The audio is from the Institute for Musicology of the Research Centre for the Humanities of the Hungarian Academy of Science. Here is the link to their data base: http://db.zti.hu/24ora/bartok.asp.
No copyright infringement intended.