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1Published 1952Subjects “...Radar in navigation....”
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2Published 1972Subjects “...Electronics in navigation Congresses....”
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3Published 1983Subjects “...Artificial satellites in navigation Congresses....”
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4Published 1978Subjects “...Artificial satellites in navigation Congresses....”
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5by Legerer, F. J.Subjects “...Ice navigation Arctic regions Congresses....”
Published 1975
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6Published 2011SubjectsConference Proceeding Book