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Trutt, F. C.; Kohler, J. L.; Rotithor, H.; Novak, T.
view article (1.0)Sensitive Ground-Fault Protection for Mines. Phase 3. Coordination-Free GFR's for AC Distribution. Mining Research Contract Report.Pennsylvania State Univ., University parkBureau of Mines, Washington, DC, OFR 2-89, June 22, 1988, 97 p.