The site which Matthew mentions is called The World's Jukebox . It's an absolute treasure trove of obscure LPs of ethnic music, most of which are available for download.

Normally I get decidedly uptight about people who slap stuff onto the 'net without regard for intellectual property or the laws of copyright. In this case though, all the stuff, including the World Library discs, is way out of catalogue. What's more, because most of these issues belong to the major labels, who presumably have no interest in re-issuing that which does not sell, they are unlikely ever to see the light of day again. Unless some kind soul puts them on the Internet of course.