Browse Items (6 total) Tags: coal mines Browse All Browse by Tag Sort by: Title Creator Date Added Monarch Mine Tags: accidents, coal mines The Coal and Metal Miners' Pocket Book Tags: books, coal mines, miners All mines in Northern Colorado closed Tags: Boulder County, coal mines, Mines, strikes, unions, United Mine Workers The Coal and Metal Miners' Pocket Book Tags: books, coal mines, miners 8000 Colorado minors on strike Tags: Boulder County, coal mines, Mines, strikes, unions, United Mine Workers The Coal and Metal Miners' Pocket Book Tags: books, coal mines, miners
