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Continue to ChatCoal Discovered in Negev; Depth Makes Its Mining Unprofitable https://www.jta.org/archive/coal-discovered-in-negev-depth-makes-its-mining-unprofitable
Coal Discovered in Negev; Depth Makes Its Mining Unprofitable https://www.jta.org/archive/coal-discovered-in-negev-depth-makes-its-mining-unprofitable