出典:Wikipedia
出典:『Wikipedia』 (2011/07/19 02:43 UTC 版)
The Progressive Miners of America (PMA) was a coal miners' union organized in 1932 in downstate Illinois. It was formed after United Mine Workers President John L. Lewis, sided with coal operators and subverted a contract referendum which would have reduced a miner's daily wage from $6.10 to $5.00.