I've just come across a book which should interest anyone interested in miners songs and labour struggles. It's called:-

They Say in Harlan County: An Oral History (Oxford Oral History Series) [Hardcover] Alessandro Portelli.

It's currently in stock at Amazon UK at £22.50.

There's an extremely favourable review of the book at http://www.indiana.edu/~jofr/review.php?id=1210

and the manufacturer's product description is at http://www.amazon.co.uk/They-Say-Harlan-County-History/dp/0199735689/ref=sr_1_1?ie=UTF8&qid=1299701705&sr=1-1 .