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Aguilar+%28Colo.%29 and Aguilar+%28Colo.%29 and Coal+mines+and+mining and Aguilar+%28Colo.%29 and Interviews and Coal+miners--Personal+narratives by Tapoya%2C+John and Bisulco%2C+Alex and Bisulco%2C+Alex from 1978-08-20 and 1913%2F1978 and 1913%2F1978
- UC Boulder