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831156 Study of longwall subsidence in the appalachian coal region using field measurements and computer modeling techniques : Proc 1st Conference on ground Control in Mining, Morgantown, 27–29 July 1981, P220–229. Publ Morgantown: West Virginia University, 1981

✍ Scribed by M. Karmis; C. Haycocks; I. Eitani

No coin nor oath required. For personal study only.

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