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MDU Resources Group, Inc. (NYSE:MDU) reported second quarter consolidated earnings of $44.9 million, or 24 cents per common share, compared to $48.8 million, or 26 cents per common share for the second quarter of 2010.

MDU Resources Group, Inc. operates as a diversified natural resource company in the United States. The company was founded in 1924 and is based in Bismarck, North Dakota.

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