Author: Publisher:
ISBN:
Category : Anthracite coal
Languages : en
Pages : 36
Book Description
Experimental Longwall Mining in a Pennsylvania Anthracite Mine (in Two Parts). PDF Download
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Author: Publisher:
ISBN:
Category : Anthracite coal
Languages : en
Pages : 36
Book Description
Author: 
Author: Robert J. Brennan
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Author: United States. Bureau of Mines
Author: Wilbert T. Malenka
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