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"MDU Resources Announces Webcast of Analyst Conference Call  BISMARCK, N.D.--(BUSINESS WIRE)-- MDU Resources Group, Inc. (NYS: MDU) will webcast its first quarter 2013 earnings conference call"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.aol.com/article/2013/04/02/mdu-resources-announces-webcast-of-analyst-confere/20527259/?gen=1>