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Kohle
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11th Intersociety Energy Conversion Eng. Conf. Proc., State Line, 12-17 Sept., 1976
11th Intersociety Energy Conversion Engineering Conf. Proc., State Line, 12-17 Sept., 1976
57 1/2-ton hopper bottom gondola for C. and O
100-ton coal cars for the Chesapeake and Ohio
3000 hp coal-fired pusher boat studied for secondary coal transportation
Accidents at coal face and their prevention