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Closure in longwall access roadways

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1. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384696

Identifer	oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:384696
Date	January 1988
Creators	Unver, B.
Publisher	University of Nottingham
Source Sets	Ethos UK
Detected Language	English
Type	Electronic Thesis or Dissertation