Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Gesonderte Abtragung und Foerderung des Humusbodens von Tagebaudecken und seine Ablagerung in gleichmaessiger Ausbreitung auf dem uebrigen Abraum unter Benutzung von Abraumfoerderbruecken
Report of a Survey and Exploration of the Coal and Ore Lands Belonging to the Allegheny Coal Company: In Somerset County, Pennsylvania; Accomppanied by Maps, Profiles and Sections