Buscar : Título Autor Tema Serie que comienza con: 10 20 30 50 100 por página < 10 encabezamientos anteriores 10 encabezamientos siguientes > Explorar resultados # Coal mines and mining. 45 SEE ALSO narrower term: Coal gasification, Underground 2 Coal mines and mining -- 1905. 1 Coal mines and mining -- Accidents -- SEE: Coal mine accidents 5 SEE: Coal mine accidents 5 Coal mines and mining -- Alabama 1 Coal mines and mining -- Alaska. 5 Coal mines and mining -- Alaska -- Matanuska River Valley. 2 Coal mines and mining -- Appalachian Region. 2 Coal mines and mining -- Arizona -- Apache County -- Transportation. 2 Coal mines and mining -- Arizona -- Black Mesa (Navajo County and Apache County) 1 Coal mines and mining -- Arkansas. 1 10 20 30 50 100 por página < 10 encabezamientos anteriores 10 encabezamientos siguientes >